The Rogue Wave is engineered for all kinds of nasty conditions. Its full neoprene and rubber upper construction provide durability and comfort. Bring it on, Mother Nature. Rubber and neoprene upper, GRIP-X outsole traction pattern, Thick 8MM molded EVA footbed, Commercial grade reinforced webbing pull-straps, 38 ounces per pair. Our non-slip outsole tread pattern gives a lock down grip on wet and slippery surfaces. Each lug is engineered to grab in all directions while the micro-channel openings allow water to escape.