Signature SPF 50 Mineral Lotion

Signature SPF 50 Mineral Lotion

Our high-performance, non-nano zinc mineral sunscreen offers the very best broad spectrum protection to those who play hard in the water and sun.

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More About This Product

Why We Made This

We developed our Signature sport sunscreen line for those stay-all-day days. Our premium, non-nano zinc mineral sunscreen won’t run into your eyes or come off during the most rigorous activities in the water, wind, or blazing hot sun. Sized to travel in your carry-on (because we don’t check luggage).  

Sun Bum Signature is used and trusted by many lifeguard and beach rescue organizations throughout the U.S., including the Hawaiian Water Patrol, the North Shore Lifeguard Association, and the Eastern Surfing Association. 

Trust The Bum® 

  • Non-nano zinc mineral protection 
  • High performance 
  • Seriously water resistant   
  • Won’t run into your eyes  
  • Fragrance free 
  • Hawaii Act 104 Compliant: Made without Oxybenzone & Octinoxate 
  • Vegan 
  • Cruelty Free 
  • Gluten Free 
What's Inside

Active Ingredient:  Zinc oxide 21% 

 Inactive Ingredients:  water, ethylhexyl palmitate, caprylic/capric triglyceride, butyloctyl salicylate, capryloyl glycerin/sebacic acid copolymer, cetearyl alcohol, microcrystalline cellulose, coco-glucoside, ethylhexyl- glycerin, isostearic acid, lecithin, phenoxyethanol, polyglyceryl 3 polyricinoleate, polyhydroxystearic acid, pongamia pinnata seed extract 

The Good Stuff:

Vitamin E:An antioxidant that helps to neutralize free radicals, which are the main cause of premature skin aging

How To Use

Apply liberally 15 minutes before sun exposure. Reapply: After 80 minutes of swimming or sweating. Immediately after towel drying. At least every 2 hours.

Drug Facts

Warnings

  • For external use only.
  • Do not use on damaged or broken skin.
  • When using this product keep out of eyes. Rinse with water to remove.
  • Stop use and ask a doctor if rash occurs.
  • Keep out of reach of children. If swallowed, get medical help or contact a Poison Control Center immediately.

Directions

  • Shake bottle well.
  • Apply liberally 15 minutes before sun exposure
  • Reapply:
    • after 80 minutes of swimming or sweating
    • immediately after towel drying
    • at least every 2 hours
    • children under 6 months of age: ask a doctor
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Pairs Great With

How to Use Daily 50 Body Lotion

Apply our Daily 50 Body Lotion liberally 15 minutes before sun exposure. Reapply body sunscreen every 80 minutes and more frequently after swimming/sweating, and excessive towel drying. We love incorporating this as the last step in our morning skincare routine.

How to Use Daily 50 Face Lotion

Shake well before use. Apply our Daily 50 Face Lotion liberally 15 minutes before sun exposure. Reapply face sunscreen every 80 minutes and more frequently after swimming/sweating, and excessive towel drying. We love incorporating this as the last step in our morning skincare routine.

How to Use Daily Glow Lotion

Shake well before use. Apply our Daily Glow Lotion liberally 15 minutes before sun exposure. Reapply every 80 minutes and more frequently after swimming/sweating, and excessive towel drying. We love incorporating this as the last step in our morning skincare routine.

How to Use Daily 50 Face Gel

Shake well before use. Apply our Daily 50 Face Gel liberally 15 minutes before sun exposure. Reapply every 80 minutes and more frequently after swimming/sweating, and excessive towel drying. We love incorporating this as the last step in our morning skincare routine.

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What's an SPF?

The SPF (Sun Protection Factor) on a bottle of sunscreen indicates the level of protection we're getting from the sun's UVB rays—which are the sun rays most commonly responsible for sunburns and skin cancer.

How SPF Is Calculated and Why Does It Matter?

SPF, which stands for Sun Protection Factor, has been used for decades to determine the level of protection someone can expect from the sunscreen they use. It can often vary from person to person given multiple factors such as testing methods and environmental factors. In addition, everyone’s skin is different, which can also affect what kind of SPF is best suited to fit their individual needs.

A common misperception is that the SPF number on a bottle signifies the amount of time you can spend in the sun without getting burned (30 minutes for SPF 30, 50 minutes for SPF 50 etc.) This is not accurate. In fact, the SPF rating system is far more complex and based on the degree to which a certain formula protects against the sun’s harmful UVB rays over a certain period of time. For example, a sunscreen with a rating of SPF 30 allows only 3 photons per 100 to penetrate the skin, meaning it shields approximately 97% of the sun’s harmful UVB rays. This roughly translates to 30 times the protection you’d have versus using no sunscreen at all. This extends to SPF 50 (98% or 50 times the protection) and SPF 70 (98.5% or 70 times the protection). The length of time that a sunscreen will protect you from sunburn will vary based on the UV index at the time as well as other factors.

At Sun Bum, we like to think we make sun care products for everyone. So, whether your SPF preference is 30 or 50, mineral or non-mineral, lotion or spray, you can stay protected from the sun’s harmful rays. As noted by the Skin Cancer Foundation, “The best sunscreen is the one you’ll use.”

How Do Global Standards to Assess SPF Differ?

Global SPF assessment standards have been updated several times over the years, with the most recent update in 2019. The purpose of these updates—which were led by regional regulators and groups such as the International Organization for Standardization (ISO)—was to reduce the variability of SPF assessments. Currently, even the globally recognized “gold standard” SPF test — the in-vivo test known as SPF ISO-24444 — is subject to considerable variability due to the inherent human biases built into the testing process (Ruvolo, Yousefian,International Journal of Cosmetic Science, Dec. 2025). Because of this, there is an increasing call for governments and regulators to update the testing protocols and standards they recommend for manufacturers to follow — for example, using the HDRS-ISO 23698 test: an in vivo/in vitro hybrid that addresses some of the more subjective factors common with in-vivo only testing. (Ruvolo, Yousefian,International Journal of Cosmetic Science, Dec. 2025).

According to the Skin Cancer Foundation, 1 in 5 Americans will get skin cancer in their lifetime. We wanna change that.

We've Got Answers

Does Mineral Sunscreen Clog Pores?

Nope! Mineral sunscreen sits on your skin instead of soaking into it, which means it won’t clog your pores or make you break out. In fact, zinc oxide (one of the main ingredients) is actually pretty rad for acne-prone skin—it helps calm inflammation and redness. So whether you’ve got sensitive skin or just don’t want to risk waking up with a surprise breakout, mineral sunscreen’s got your back.

Can You Still Tan With Mineral Sunscreen?

Yep, kinda. Mineral sunscreen blocks most of the UV rays that burn your skin, but a little bit of UVA still gets through, which means you might get a slight tan over time. But here’s the thing—tanning is still sun damage, even if it looks good in the moment. If you love that sun-kissed glow, keep in mind that it can also lead to wrinkles and sun spots over time.Play it smart, wear your sunscreen, and maybe just go for a bronzer instead.

Can I use this on my face?

Yes, you can totally use our Roll-On Lotion on your face. It's non-comedogenic, so it won't clog pores. And if you're sensitive to scents, this Fragrance Free sunscreen option works great for the face.

Signature SPF 50 Mineral Lotion
$20.49