Our sleek Mt. Washington work jackets combine the power of Thermolite(R) insulation with ripstop fabric to take on job sites in cooler weather. Main fabric is lightweight 100% ripstop nylon with RainRepel(TM) technology. Lining is 100% polyester. Fill is 100% recycled Thermolite(R) insulation. Stand-up collar with chin guard. Stretch ribbed bi-swing back for added mobility.