Georgia waterproof system. Oil- and slip-resistant rubber outsole. Rubber heel kick plate for ease of boot removal. Fiberglass shank. Vulcanized Rubber Construction. Neoprene and rubber upper. 10 Inches in height. Shaft height and circumference may vary by size. 16-inch calf circumference. Weight: 3.5 pounds per pair for a size 10. AMP LT insole with memory foam.