The Hiyak is Astral’s view of a proper bootie, offering ground-conforming stability, foot protection and insulation without neoprene. The result is a lighter, more durable, fast drying water-boot with phenomenal gripping powers.

G.ss (Super Sticky) outsoles provide the best grip in watersports. G.ss is non-marking and provides good abrasion resistance. Its low durometer (measure of hardness) lessens impact and provides excellent conformity to ground surfaces

Outsole FlexGrip sticky highest friction razor-siped G.ss rubber compound
Midsole Removable 7mm 45C closed cell EVA foam
Upper Hydrophobic Canvas with 1060D ballistic nylon reinforcement 
Lug Depth 3.5mm
Foot to Ground Distance (Stack Height) 12mm heel, 11mm ball
Fit True to size (Available in whole sizes. For half size, size down)
Average Weight (per Shoe) 8.82 oz. (250g)

Astral Men's Hiyak Shoes:

Available in US whole sizes only. Fits true to size. For half sizes, size down.

US Men'sUS Women'sUKEUCM
786.54025.5
897.541 1/326
9108.542 2/327
10119.54428
11--10.545 1/328.75
12--11.546 2/329.5
13--12.54830.5