WATERPROOF AND WARM SNOW BOOTSPerfect for deep snow. Waterproof upper, felt inner boot for warmth, and multi-directional lug sole for steady grip. Easy on and off.UPPER: Durable water and wind resistant PU backed synthetic textile upper. Built in gaiter with barrel lock closure system and fixed elastic instep strap.INSULATION: Synthetic insulation. Removable 6 mm washable recycled felt inner boot