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. Details: Hydrophobic Canvas upper with 1060D ballistic nylon reinforcement rand, high top padded ankle protection with semi-rigid heel cup, 3mm quilted spacer-mesh lining, hidden laces with touch fastener over-flap, reflective logo at heel and tongue, water resistant laces, removable, 7mm thick 45C closed cell EVA foam midsole, G.ss highest friction G Rubber compound with razor-siping and drain holes toe and heel, 3.5mm thick outsole, non-marking. Intended use: Water, boat. Flex grip outsole - allows excellent flexibility and sensory feedback for heightened grip and balance. Maximized surface area for high friction on smooth surfaces. Divided lugs for substantial grip on loose dirt. Razor-siping maximizes edges that bite into surfaces upon flexion. All Astral shoes have a special relationship with water. Every component, from the thread to the laces are critically evaluated and chosen for its ability to hold up after constant soaking, to shed water and not to accumulate funk. Footbeds are essentially level (only 1mm drop from heel to toe) and provide medium arch support. Tapered instep and heel area for better foothold and control. Foot to ground distance: 12 mm heel, 11 mm ball. Fit: True to size (for half size, size down). Material: Hydrophobic Canvas, EVA Foam, G Rubber. Astral was founded in 2002 on the banks of the Rocky Broad River near Asheville. First brand products were life jackets that were known to promote calm confidence in the most extreme whitewater. Today Astral footwear combines performance and fashion with the goal creating the perfect outdoor sneakers and flops. Whether you need amphibious shoes, canyoneering shoes, travel shoes, camp shoes, approach shoes, casual shoes or hiking shoes - you're covered.