100% Waterproof Rubber construction provides complete waterproof protection & warmth Kick-off heel plate Smooth comfort liner wicks moisture Primaloft Aero Gel insert Black Label Elite Uninsulated Rubber Boot 100% WaterproofRubber construction provides complete waterproof protection & warmthKick-off heel plateSmooth comfort liner wicks moisturePrimaloft Aero Gel insertRZ-Traction boot design is anatomically molded to match foot movement with a unique, deep-fluted traction pattern that grips, flexes and responds for maximum traction & stabilityWeight approximately 3.0 poundsFit is true to size.