IST 3mm Tall Cut Boots with 10mm Thick Felt Sole combine the utility of a sturdy felt sole with the comfort and flexibility of a 3mm neoprene upper. Hard, thick felt soles provide traction on jagged, slippery coastal reefs and ensure a good grip for clambering up slick boat ladders. Toe and heel caps provide extra reinforcement, thickness and protection in high-wear areas prone to abrasion. Heavy duty #10 YKK zippers are built to last. These rugged boots are a great choice for diving, spear fishing or surf fishing.