Good stuff! Zinc based and
"Good stuff! Zinc based and works well. I wish it was in a bigger container than 3oz."
Build Your Own Bag
Travel Sized
Set it & Get It
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.
Warnings
Directions
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.
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.”
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).
Overall rating: 4.5333333 / 5 from 75 reviews.
The Signature SPF 50 Sunscreen Lotion provides broad spectrum protection without irritating the skin, though opinions on the size vary.
Review topics: [size, design, skin, sunscreen, coverage, protection, fit, smells, container, sun, water, fragrance, eyes, body, face, top].
"Good stuff! Zinc based and works well. I wish it was in a bigger container than 3oz."
"WORKS GREAT! LOVE THE EASY POCKET DESIGN!"
"Love this! Perfect for cycling and any outdoor endurance sport. This is my 3rd bottle."
"Best sunscreen I have found for my face when I golf. Stays effective the whole round, and no stinging in my eyes."
"Received the product as promised on time It's the only sunscreen that I can use on my face that has never caused irritation to my eyes"
"Love, love, love this sunscreen! Can put it close to eyes and it does not make them sting!!! Excellent!"
"So as a Florida momma with an autistic child who loves the water as much as I do, this sunscreen is a game changer. It goes on smooth without being greasy at all. It absolutely stays put and does not end up in your eyes which is essential for my son because he is constantly wiping the water off of his face and never has he ended up with it in his eyes or had that awful sunburn under his eyes. We spent hours in the water and whether is was saltwater or the chlorinated high speed water at the waterparks, it did it's job with zero sunburn. I am a costumer for life."
"Love the strength of this block. Lasts through hours of very active play in 95+ heat and August humidity. Goes on white but clears up shortly thereafter. Planning to purchase many more bottles!"
"Bought this for my son because his job keeps him outside most of the day. This handy size fits in a pocket within reach for reapplication and protection. I have had this size myself and loved the convince of it. Plus it’s SPF 50!!! Can’t beat that."
"Really like the product. Dries clear very quickly. Stays in place. Water resistant. Very convenient size and shaped container."