Sun Bum's Original SPF 15 Sunscreen Lotion moisturizes as it protects the skin from damaging UVA and UVB rays. This carry-on-friendly sunscreen is formulated with vitamin E to counteract harmful free radicals that cause premature aging.As well as being reef-friendly, this oil-free lotion works with all skin types. Reapply after towel drying or at least every two hours.