Astral Loyak Water Shoes It looks so casual you wouldn't suspect it of being a high-performance watershoe. The Astral Women's Loyak gives you superb grip, great comfort and it'll fit in any kayak. The upper is a hydrophobic canvas for durability, with 2.5 mm Airmesh in the vamp and tongue for breathability. 7 mm thick closed-cell foam midsole provides cushioning comfort for your foot. G.15 high-friction rubber sole is super flexible for fitting in tight spaces. It's 3.5 mm thick, razor siped for additional grip and non-marking. Recessed stitching securely connects the canvas upper directly to the outsole rubber. Roomy toe box keeps your foot happy. Holes at toe and heel allow water to escape, while reducing entry of sand and silt. With its superlative grip, comfort and chilled-out looks, the Loyak is your kayaking, rafting, SUP, sailing and everyday summer shoe.