... proof,anti-acid,anti-alkaline,abrasion resitance, protect ankle and shin.sweat-absorbent,breathable, high temperature proof, durable,flexiable ... folding. PVC safety work shoes no shrinked and hardened by expanding with heat and contracting with cold.Lining cloth never falls off. ... hospital,laboratory etc. It meets CE EN ISO20345:2004. with steel toe and midsole best quality black safety boots CE20345