Amazon.com | GIEESHIELD Rubber Boots for Men & Women – Ultra 。Product details About this item Origin Imported Sole material Polyvinyl Chloride Shaft height Knee High Shaft circumference 17.4 Inches About this item Injection molded construction for 100-Percent waterproof protection; Tingley recommends ordering up for split sizes (i.e., if you wear a Men\'s size 11-1/2 shoe, size 12 boots are preferred in most cases) 15-Inch Height with a 12-inch cutline to facilitate fast and clean height modification Flexible upper material stays supple in cold temperatures to make walking easier Tougher outsole material for good abrasion resistance Self cleaning cleated outsole, spits out debris as you walk