The insulated Men’s ThermoBall Boot Zip-Up will help keep your feet warm, protected and comfortable through the winter.Upper: Waterproof, PU-coated leather upperRecycled P.E.T. baffled-ripstop shaft with a non-PFC durable water-repellent (non-PFC DWR) finish for added water repellencyThermoBall™ Eco 100% recycled polyester insulation helps keep feet warm even when wetSole Unit: Lightweight, injection-molded, ground-contact EVA midsole/outsoleUltrATAC™ rubber outsole for high-level traction