TINGLEY 31261 PVCRUBBER KNEE BOOTS SIZES: 7-14 (MENS) FREE SHIPPING Polyvinyl Chloride sole Shaft measures approximately Knee High from arch Boot opening measures approximately 16.6″ around Composite safety toe meets or exceeds ASTM F2413 M/I/C and does not transfer cold or set off metal detectors 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 boot height with a 12-inch cut-line to facilitate fast and clean height modification Flexible upper material stays supple in cold temperatures to make walking easierTougher out-sole material for good abrasion resistance