With a waterproof synthetic exterior and 200g insulation, this winter boot keeps feet warm and dry. Made for playing in the snow, mud, and grass with a multidirectional lug sole for enhanced traction.UPPER: PU backed synthetic textile upper. Fleece lining.INSULATION: 200g insulation.MIDSOLE: 2.5 mm bonded felt frost plug.OUTSOLE: Injection molded waterproof thermal rubber shell with multi-directional lug outsole for enhanced traction.Bin: Mili Rack 2496