100% Waterproof, 100% MuckProof; Lightweight EVA midsole for added comfort; bioDEWIX Anti-Microbial Footbed Insert Topcover with NZYM for Odor Control and Moisture Management; 5mm Neoprene Bootie for Comfort and Performance; Cool Weather Lining: Soft, Insulation, Light-weight, Performance Materials for Warmth and Comfort; Rugged rubber outsole for traction; Warm Lining: Soft, Insulation, Light-weight, Performance Materials for Warmth and Comfort; Comfort range: Cold climates, -40 degree F to 40 degree F or -40 degree C to 4 degree C