Pvc Hi-Top Overshoes Med Made with a revolutionary poly vinyl chloride compound that stays supple in the coldest weather Injection molded, seamless construction for 100 percentage waterproof protection Workbrutes poly vinyl chloride overshoe has 46 percent more material in its outsole than the nearest slush molded competitor Thicker tread has deeper cleats with sharper edges for more traction For longer life more material is added to the sole at the greatest wear points the heel, toe and cleats