Inspired by the Woody Sport and Wetland, the Muck Boots Men's Woodland Pro 17" Rubber Boot is rebuilt from the ground up. Its Leaf Spring System delivers all-day comfort, traction, impact absorption, and stability in every step. 100% waterproof and ready for harsh conditions, with optional 400g PrimaLoft Gold insulation for lightweight warmth. Built to go farther and perform when it counts. Features100% waterproof, 100% MUCKPROOF5mm neoprene bootie with DWR treatment400 grams PrimaLoft Gold insulationWarm lining: soft, insulation, lightweight, performance materials for warmth and comfortGusset for extended fitTPU shank for stabilityLeaf spring multi-plate that provides protection and energy returnRugged rubber outsole with variable lugs and XForce suspension heel to reduce impactMaxfit Core BioLite footbed