Epi-Pet worked with the FDA to make sure this product meets the ingredient stability requirements for pet sunscreens. Tocophery, a well-known antioxidant was added to help promote healing for burned or damaged skin. This Sun Protector Sunscreen blocks damaging UVA & UVB rays to prevent sunburn and reduce the chance of developing skin cancer. It does not leave an oily film, and it has a pleasant vanilla fragrance. It is environmentally friendly. 4 oz.