Natural rubber overshoes from Tingley easily stretch to fit over bulky work shoes and feature reinforced heels and toes for tough, daily wear. Injection-molded, seamless construction provides 100% waterproof protection. Tensile strength, ease of stretch and tear resistance provide increased durability and easy on/off. No lining allows easy cleaning and decontamination.Tingley Rubber Corp.,, (800) 631-5498