Everything about the Gradient 3.0 has been designed for water. The Vibram sole, made from ultra sticky Idrogrip rubber compound with traction lugs, keeps your feet planted when climbing or descending. The midsole's dual density foam cushions your heal and aids stability and control with denser foam on the forefoot. The upper is designed for durability in the water too including a neoprene cuff that keeps out river grit. The large toe box has plenty of wiggle room and the insole is removable to make space to add winter socks.