The Loap TUBE men's insulated outdoor lace-up boots have a tough upper made of durable and strong polyurethane combined with fabric. The synthetic heel and toe overlays protect the shoes from scuffs, snow, mud and puddles. The lining is made of warm fleece so they are pleasantly warm. The removable insole is also made of fleece and also of EVA foam material which perfectly absorbs shocks. The shoes have a sole made of light and soft phylon which absorbs all shocks, as well as of thermoplastic rubber.