One Size Secure The Sweat Primer Review 2026: Worth It?

You just spent 45 minutes on a flawless beat. You step outside. Within an hour, your foundation is sliding off your face like butter on a hot pan. Sound familiar?

If you have oily or sweat prone skin, this struggle is real. That is exactly why the ONE/SIZE Secure The Sweat Waterproof Mattifying Primer by Patrick Starrr has taken the beauty world by storm.

This primer promises to absorb excess sweat and oil, tighten pores, and keep your makeup locked in for up to 12 hours. Bold claims, right? Thousands of beauty lovers have already put it to the test. Some call it a game changer. Others say it fell short. So what is the real story?

Key Takeaways:

• The ONE/SIZE Secure The Sweat Primer is a sweat proof, waterproof, and aluminum free formula that absorbs excess oil and sweat using bamboo marrow powder. It works best on oily and combination skin types and provides a smooth, matte base for makeup application.
• Clinical testing shows it stays oil resistant for up to 12 hours. Many real users report their makeup lasting 10+ hours even in hot and humid conditions. This makes it one of the longest wearing primers available right now.
• Key ingredients include bamboo marrow powder, horsetail extract, sage extract, squalane, and niacinamide. These work together to control sweat, tighten the appearance of pores, and keep skin hydrated without a greasy feel.
• Application technique matters a lot with this primer. You need to use a small, pea sized amount and wait at least one minute before applying makeup on top. Skipping this step can cause pilling and uneven texture.
• The full size retails for around $34 and a travel size is also available. It is sold at Sephora, the ONE/SIZE website, Amazon, and Kohl’s. The price point is mid range for a premium primer.
• It works especially well for outdoor events, gym sessions, and hot weather days. However, people with dry skin may find it too mattifying without a hydrating moisturizer underneath.

Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

What Is The ONE/SIZE Secure The Sweat Primer?

The ONE/SIZE Secure The Sweat Primer is a waterproof, sweat proof, mattifying face primer created by Patrick Starrr’s beauty brand ONE/SIZE. It launched with the goal of solving one of the biggest makeup frustrations: sweat and oil destroying your look throughout the day.

This primer uses an aluminum free formula to absorb excess sweat and oil. Unlike traditional antiperspirant ingredients, it relies on plant based powders and extracts to control moisture on the skin. The result is a smooth, matte canvas that grips your foundation and keeps it in place.

The product comes in a sleek, pump style bottle. The full size contains 30 mL (1 oz) of product, while the travel size holds 10 mL (0.33 oz). It has a lightweight gel texture that feels almost invisible on the skin once it dries down.

ONE/SIZE markets this primer for all skin types. However, it clearly shines brightest on oily and combination skin. People with these skin types have reported the most impressive results. The brand also notes it is dermatologist tested, sensitive skin friendly, and non comedogenic.

Who Is Patrick Starrr And Why Does His Brand Matter?

Patrick Starrr is a beauty influencer, makeup artist, and entrepreneur who built his following on YouTube and social media. He is known for his bold, inclusive approach to beauty. His brand ONE/SIZE was created with the idea that beauty products should work for everyone, regardless of skin type or tone.

The brand name itself reflects this philosophy. Every product is designed to perform across a wide range of skin types and concerns. Patrick Starrr brought his years of professional makeup experience into the formulation process. He wanted products that could survive real world conditions like heat, humidity, and long hours.

ONE/SIZE has earned a strong reputation at Sephora, where it is one of the featured indie beauty brands. The Secure The Sweat Primer became one of the brand’s best sellers thanks to viral moments on TikTok and YouTube. Beauty creators filmed wear tests in extreme heat, and the results spoke for themselves.

What makes Patrick Starrr’s approach different is his focus on practical performance. He does not just want a primer that looks good in a studio. He wants one that holds up during a 12 hour day in the Florida sun. That real world testing philosophy runs through the entire ONE/SIZE product line.

Key Ingredients And What They Do

Understanding what goes into this primer helps explain why it works. The formula contains several active botanical ingredients that each serve a specific purpose.

Bamboo Marrow Powder is the star ingredient. It works as a natural absorbent that soaks up excess sweat and oil from the skin’s surface. This is what gives the primer its signature mattifying effect without making your skin feel stripped or dry.

Horsetail Extract and Sage Extract are included for their astringent properties. These plant extracts help tighten the appearance of pores and control surface moisture. They have been used in skincare for centuries due to their natural oil balancing abilities.

Squalane is a lightweight moisturizing ingredient that prevents the primer from drying out your skin. It adds a layer of hydration without contributing any greasiness. This makes the formula comfortable for all day wear.

Niacinamide (Vitamin B3) is a well known skincare ingredient that brightens skin tone and supports the skin barrier. It also helps regulate oil production over time. Including niacinamide gives this primer a slight skincare benefit on top of its makeup gripping performance.

The formula is water based, which is important to note for foundation pairing. Water based primers generally work best with water based foundations. Using a silicone based foundation on top may cause pilling or separation.

Top 3 Alternatives For ONE/SIZE Secure The Sweat Primer

Milk Makeup Hydro Grip Primer

Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

Smashbox The Original Photo Finish Smooth & Blur Primer

Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

e.l.f. Power Grip Primer

Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

How To Apply The Secure The Sweat Primer Correctly

Application technique can make or break your experience with this primer. Many negative reviews trace back to incorrect usage. Follow these steps for the best results.

Start with clean, moisturized skin. If you have dry patches, apply a lightweight hydrating moisturizer first and let it fully absorb. The primer works best on a prepped but not overly wet surface.

Dispense a pea sized amount onto your fingertips. The pump can release too much product, so press gently. A little goes a long way with this formula. Using too much can lead to pilling and a cakey feel under foundation.

Spread the primer across your face using gentle, pressing motions. Focus on areas where you tend to get the most oily or sweaty. For many people, this means the T zone, forehead, nose, and chin. You do not need to apply it all over unless your entire face gets oily.

Here is the critical step: wait at least one full minute before applying foundation or any other makeup. The formula needs time to set and create that grip. Skipping this wait time is the number one reason people experience pilling.

Once the primer has dried down, apply your foundation as usual. For maximum longevity, pair it with the ONE/SIZE On ‘Til Dawn Mattifying Waterproof Setting Spray.

Real World Performance: Does It Actually Last 12 Hours?

The brand claims this primer keeps skin oil resistant for up to 12 hours. That is a big promise. So does it hold up in real life?

Based on hundreds of user reviews and multiple YouTube wear tests, the answer is mostly yes. Many users report their makeup staying intact for 10 to 12 hours in normal to warm conditions. Some beauty creators have filmed 9 hour wear tests in direct heat and came away genuinely impressed.

In hot and humid environments, the primer really shows its strength. TikTok users have posted videos after walking outdoors in summer heat, and their foreheads stayed sweat free. This is the exact scenario the product was built for.

However, results vary by skin type. People with extremely oily skin may still see some breakthrough shine around the 8 to 9 hour mark. In those cases, a quick blot with oil absorbing sheets can extend the wear even further.

For people with normal to dry skin, the primer can feel too drying after several hours. Adding a hydrating layer underneath or mixing in a drop of facial oil before application can help balance things out.

How Does It Feel On The Skin?

Texture and comfort matter just as much as performance. Nobody wants a primer that feels heavy or uncomfortable throughout the day.

The Secure The Sweat Primer has a lightweight gel texture that blends smoothly into the skin. It absorbs quickly and leaves behind a soft, velvety matte finish. Most users describe the feel as barely there once it sets.

There is no tacky or sticky residue. Unlike some grip primers that feel like glue on the skin, this one dries down to a powdery smooth surface. Your fingers glide over the skin without friction after the primer has set.

One common observation is a slight tightening sensation upon application. This comes from the astringent plant extracts doing their job. It is not uncomfortable, but it is noticeable. Think of it as a sign that the pore tightening ingredients are active.

The formula is fragrance free, which is a bonus for anyone with sensitive skin. There are no strong chemical smells or added perfumes. This makes it a solid choice for people who react negatively to scented beauty products.

Is It Good For Oily Skin?

This is where the ONE/SIZE Secure The Sweat Primer truly earns its reputation. Oily skin types benefit the most from this product.

The bamboo marrow powder absorbs oil effectively throughout the day. Users with oily T zones report a significant reduction in midday shine. Some have described it as the first primer that actually stopped their foundation from breaking apart by lunchtime.

The mattifying effect is strong but not extreme. Your skin will not look flat or chalky. Instead, it creates a natural, skin like matte finish that still allows some dimension. This is important because overly matte products can sometimes make skin look lifeless.

For people who combine this primer with an oil free, matte foundation, the results are even more impressive. The double layer of oil control can extend wear time well beyond the standard 8 hours. Wedding makeup artists and event professionals have started incorporating this primer into their kits for exactly this reason.

If your skin is oily in summer but normal in winter, this primer is an excellent seasonal addition to your routine. You might not need it year round, but having it on hand for hot weather months is a smart move.

Can You Use It On Dry Skin?

Dry skin types can still use this primer, but they need to take extra precautions. The mattifying formula can emphasize dry patches and flaky areas if applied directly on bare, unprepped skin.

The solution is simple. Layer a hydrating moisturizer or serum underneath and let it fully absorb before applying the primer. This creates a moisture barrier between your skin and the mattifying agents. The result is oil control on the surface without dehydration underneath.

You can also apply the primer only to specific areas that tend to get oily. Many people with dry cheeks but an oily T zone use this targeted approach. Apply the primer to the forehead, nose, and chin while skipping the drier parts of the face entirely.

The squalane in the formula does provide some hydration, but it is not enough on its own for very dry skin types. Think of this as a performance product first and a skincare product second. If you prioritize comfort and moisture, a hydrating primer like Milk Makeup Hydro Grip may suit you better.

Packaging And Value For Money

The ONE/SIZE Secure The Sweat Primer comes in a sturdy, opaque pump bottle. The design is clean and minimal, fitting the brand’s modern look. However, there is one common complaint about the packaging.

The pump dispenses more product than most people need in a single press. This can lead to waste if you are not careful. A gentle, half press is usually enough for one application. Some users decant the product into a smaller container for better control.

At $34 for the full size (30 mL / 1 oz), the price sits in the mid range category for prestige primers. It is less expensive than some luxury options but more costly than drugstore alternatives like the e.l.f. Power Grip Primer.

The travel size at 10 mL (0.33 oz) is a great option if you want to test the product before committing to the full bottle. It is available at Sephora and Amazon. Given that a little goes a long way, even the travel size can last several weeks of regular use.

Overall, the value is solid for the performance you get. If you go through primers quickly because of excessive oil or sweat, this product may actually save you money by reducing the need for touch ups and reapplication throughout the day.

What Are The Pros And Cons?

Every product has its strengths and weaknesses. Here is an honest breakdown of the ONE/SIZE Secure The Sweat Primer.

The pros are significant. It delivers on its 12 hour oil resistance claim for most users. The aluminum free formula is a safer alternative to antiperspirant based primers. The lightweight gel texture feels comfortable and invisible. It works exceptionally well in hot and humid conditions. The inclusion of niacinamide and squalane adds skincare benefits.

The cons are worth noting too. The pump dispenses too much product, which can lead to waste. Some users experience pilling if they do not wait long enough before applying foundation. It can feel too drying for people with naturally dry skin. The water based formula may not pair well with silicone based foundations.

Another consideration is the learning curve. This is not a primer you can rush through. You need to use the right amount, wait for it to set, and pair it with compatible products. Once you dial in the technique, the results are excellent. But the first few uses may require some patience.

How Does It Compare To Other Sweat Proof Primers?

The primer market is crowded, and several products compete for the sweat proof crown. Here is how the ONE/SIZE Secure The Sweat Primer stacks up.

Compared to the Milk Makeup Hydro Grip Primer, the Secure The Sweat Primer offers stronger oil control. The Hydro Grip is better for dry skin types who want a dewy, hydrated finish. If your main concern is sweat and oil, the ONE/SIZE primer wins. If you want hydration and grip, Milk Makeup takes the lead.

Against the Smashbox Photo Finish Primer, the Secure The Sweat formula has the advantage in humidity and sweat resistance. Smashbox provides a smoother, more blurring effect that is great for photos. The ONE/SIZE primer is the better choice for long outdoor events and active lifestyles.

The e.l.f. Power Grip Primer is the budget friendly competitor. At a fraction of the price, it provides decent grip and wear time. However, it does not match the sweat absorbing power of the ONE/SIZE formula. If budget is your top concern, e.l.f. is a smart starting point. If performance in extreme conditions is the priority, ONE/SIZE delivers more.

Who Should Buy This Primer?

Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API Some of the links on this website are affiliate links, which means that at no additional cost to you, I earn a commission if you click through and make a purchase. I only recommend products and services that I believe will add value to my readers. Thank you for your support!

This primer is not for everyone, and that is okay. It has a clear target audience that will get the most value from it.

You should buy this primer if you have oily or combination skin that tends to break down makeup within a few hours. It is ideal for people who live in hot, humid climates where sweat is a daily challenge. If you attend outdoor events, work out with makeup on, or simply want a long lasting matte base, this primer fits the bill.

Brides, makeup artists, and content creators who need their looks to last through long shoots or events will also appreciate the staying power. The 12 hour oil resistance means fewer touch ups and more confidence throughout the day.

This primer may not be the best fit if you have very dry skin and prefer a dewy, glowy finish. It is also not ideal if you dislike matte textures or if your current foundation is silicone based, as pairing issues may arise.

If you are on a tight budget, consider starting with the travel size to test compatibility with your skin type and foundation before investing in the full bottle.

Tips To Maximize Your Results

A few simple tricks can help you get the absolute best performance from this primer.

First, always apply your skincare and let it absorb completely before reaching for the primer. Layering the primer on top of wet moisturizer will cause pilling. Give your skincare at least 2 to 3 minutes to sink in.

Second, use a light hand with the pump. Press gently to dispense a small amount. You can always add more, but removing excess product is much harder.

Third, pair this primer with a water based or hybrid foundation for the smoothest results. Avoid heavy, silicone based formulas that may sit on top of the primer instead of bonding with it.

Fourth, finish your look with a mattifying setting spray. The ONE/SIZE On ‘Til Dawn Setting Spray is formulated to work with this primer. Together, they create a sweat proof sandwich that locks everything in place.

Finally, store the product in a cool, dry place. Extreme heat can alter the texture of the gel formula. Keeping it at room temperature ensures consistent performance every time.

Final Verdict: Is The ONE/SIZE Secure The Sweat Primer Worth It?

After looking at the ingredients, real world performance, user feedback, and how it compares to competitors, the verdict is clear. The ONE/SIZE Secure The Sweat Primer is a strong buy for anyone who struggles with oily skin, sweat, and makeup longevity.

It delivers on its core promise. Your makeup will last longer. Your pores will look tighter. Your skin will stay matte without feeling uncomfortable. The botanical ingredients add a nice touch of skincare functionality that sets it apart from generic mattifying primers.

The $34 price point is fair for the quality and performance. The travel size option makes it easy to test before committing. And the wide availability at Sephora, Amazon, and Kohl’s means you can grab it quickly whenever you need a restock.

Is it perfect? No. The pump issue, the pilling risk with incorrect application, and the learning curve are real downsides. But once you master the technique, this primer becomes a reliable workhorse in your makeup routine.

For oily and combination skin types, especially in warm climates, this is one of the best primers you can buy right now.

Frequently Asked Questions

Is the ONE/SIZE Secure The Sweat Primer silicone or water based?

The primer is water based. This means it pairs best with water based foundations. Using a silicone based foundation on top may cause pilling or separation. Always check your foundation’s ingredient list to ensure compatibility.

Does the Secure The Sweat Primer work without foundation?

Yes, it does. Many users wear it alone on no makeup days to control oil and minimize shine. The mattifying effect works on bare skin too. It gives a smooth, poreless appearance without any foundation on top.

Can you use this primer if you have sensitive skin?

The formula is dermatologist tested, sensitive skin friendly, and non comedogenic. It is also fragrance free and aluminum free. Most people with sensitive skin tolerate it well, but a patch test is always a good idea with any new product.

How long should you wait before applying foundation over this primer?

You should wait at least one full minute after applying the primer. This gives the formula time to set and create the grip needed to hold your foundation in place. Rushing this step is the most common cause of pilling.

Where can you buy the ONE/SIZE Secure The Sweat Primer?

The primer is available at Sephora, the ONE/SIZE website, Amazon, and Kohl’s. Both full size and travel size options are available. Prices may vary slightly between retailers, so checking multiple stores for deals is a smart move.

Is this primer worth the $34 price tag?

For oily and combination skin types, the answer is yes. The 12 hour oil resistance, sweat proof formula, and botanical ingredients justify the price. A little goes a long way, so one bottle lasts a long time with proper use.