... proto type or you samples for our reference.PVC safety boot function:100%waterproof,anti-slip,anti-bacterial,anti-staic,Oil ... -proof,anti-acid,anti-alkaline,abrasion resitance,protect ankle and shin.sweat-absorbent,breathable, high temperature proof, durable, ... contracting with cold.Lining cloth never falls off. The PVC boot was applied in oil fields,colliery,fire control areas. farming ...