
Astral Hiyak Water Shoes
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- Overview Overview 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 w...
- Technical Specifications Technical Specifications
SKU: PFT_ALHIYAK-Black-M0008W0009
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
- Boating high top with padded ankle protection & a semi-rigid heel cup
- Balanced geometry provides a foot position similar to barefoot
- Excellent flex & sensory feedback for heightened grip & balance
- Divided lugs grip on loose dirt
- Tapered instep & heel instep improve foothold & control
- Wide forefoot allows your feet & toes to spread out for stability
- Hydrophobic & durable canvas upper
- 3mm quilted spacer-mesh lining adds warmth
- Toe & heel drainage holes allow water to escape while keeping out sand & silt
- Hidden water-resistant laces with protective Velcro overflap
- Reflective logo at heel & tongue
- Unisex fit works for both men and women
Technical Specifications
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) |







Size Chart
Astral Men's Hiyak Shoes
Available in US whole sizes only. Fits true to size. For half sizes, size down.
US Men's | US Women's | UK | EU | CM |
7 | 8 | 6.5 | 40 | 25.5 |
8 | 9 | 7.5 | 41 1/3 | 26 |
9 | 10 | 8.5 | 42 2/3 | 27 |
10 | 11 | 9.5 | 44 | 28 |
11 | -- | 10.5 | 45 1/3 | 28.75 |
12 | -- | 11.5 | 46 2/3 | 29.5 |
13 | -- | 12.5 | 48 | 30.5 |