A natural, mineral powder formulation that blocks all UVA and UVB rays Long lasting: Sunblock 4 Pets lasts a minimum of 24 hours Easy to apply using the sponge provided The natural non-irritant formula creates a smooth coating which cannot be rubbed off easily Can be used on all areas susceptible to sunburn, including any areas that have already been damaged by the sun The non-sticky formula does not attract dirt or dust Water resistant: does not need to be reapplied after drinking