The Hiyak is Astral's view of a proper bootie. It offers ground-conforming stability, foot protection and insulation without neoprene. The result is a lighter, more durable, fast drying water-boot with phenomenal gripping powers. Intended Use: Water, Boat Uppers: Hydrophobic Canvas with 1060D ballistic nylon reinforcement rand. High top padded ankle protection with semi-rigid heel cup. 3mm quilted spacer-mesh lining. Hidden laces with Velcro Over-Flap. Reflective logo at heel and tongue. Water resistant laces. Midsole: Removable, 7mm thick 45C closed cell EVA foam. Outsole: G.ss highest friction G Rubber compound with razor-siping and drain holes toe and heel. 3.5mm thick. Non-marking. Foot to Ground Distance: 12 mm heel, 11 mm ball. Weight/shoe: Men's 9 = 273g (9.632 oz) Sizes: Men’s US 7-13 (Whole sizes only) Fit: True to size (For half size, size down)