400 gram 3M Thinsulate Insulation Neoprene Upper Air mesh interior lining Adjustable calf Grip sole for traction Stay dry no matter where you step with the waterproof Rubber Boot 2.0. The camouflage neoprene upper has a back gusset with an adjustable buckle that expands for a customizable fit. Rubber soles give sure footing over a variety of surfaces. Wherever your day takes you, PU insoles provide cushioning, and a rubber heel kick plate makes for easy hands-free removal.