To earn the Seal of Recommendation, a manufacturer must provide scientific data showing that its product sufficiently and safely “aids in the prevention of sun-induced damage to the skin.” The data are reviewed by a volunteer committee of photobiologists – experts in the study of the interaction between ultraviolet radiation and the skin.

The Seal is granted to sun protective products including sunscreens, moisturizers, cosmetics, sunglasses and window glass film, awnings, and umbrellas, sun-protective clothing, and laundry products that provide UV protection for fabrics. The Skin Cancer Foundation recommends over 800 International and U.S. products.

The Seal of Recommendation requirements listed by sun protective category:

Sunscreens:

U.S.

• A sun protection factor (SPF) of 15 or higher
• Validation of SPF number by testing on 20 subjects
• Substantiation for any claims that a sunscreen is water- or sweat-resistant
• Acceptable results for phototoxic reactions and contact irritancy testing on 20 subjects

• A sun protection factor (SPF) of 15 or higher
• Validation of SPF number testing on 10 subjects
• Substantiation for any claims that a sunscreen is water- or sweat-resistant
• Acceptable results for phototoxic reactions and contact irritancy testing on 20 subjects

• An ultraviolet protection factor (UPF) of 30 or higher
• Acceptable test results according to the AATCC method or AS/NZS Standard
• For hats, in addition to the fabric requirements specified above, a minimum brim width of 3 inches

• 99% or greater blockage of UVA and UVB radiation

• 99% or greater blockage of UVA and UVB radiation