Loyak(TM) is a versatile barefoot style, amphibious shoe providing world class grip, durability, and high performance on land and water. Technical Details Intended Use : Water, Casual, Boat, TravelUppers : 100% rPET canvas, mesh, and lacesMidsole : Removable, 45C closed cell EVA foam // Zero drop, Level FootbedA(R) from heel to ball // Minimal archOutsole : Flex Grip(TM) outsole made with non-marking, razor siped, G.15 Rubber(TM)Foot to Ground Distance : 11mmWeight/shoe : 209 g / 7.4 oz (M&';s size 9)Sizes : M&&';;s US 8 - 14 (whole sizes only)Fit : True to size (size down for half size)