Ultra Dryâ" moisture management system keeps out wet elements for a drier foot environment. Thinsulate Ultra is a lightweight, breathable insulation that traps more air closer to your body for an excellent feeling of warmth and protection against the elements. Traditional lace-up system with durable brass hardware. Padded tongue and collar for extra comfort. Goodyear welt construction offers excellent flexibility and long-lasting durability. Removable PU footbed is cushioned for all-day comfort. Steel shank provides superior stability. EVA midsole provides comfortable underfoot support. Prairie EVA rubber outsole provides stability and superb cushioning, while providing excellent traction over various kinds of terrain.