The Astral Men's Hiyak Kayak Shoe is lighter, more durable, and faster-drying than traditional neoprene booties, not to mention grippier and more stable too. The ultra abrasion-resistant Cordura upper is far more durable than neoprene, and it's bonded directly to the rubber outsole for enhanced stability. Airmesh insulation, like neoprene, traps air between your foot and the waterproof shell to keep your feet warm. But unlike neoprene, it dries out overnight so it's ready to go again the next day. A removable EVA midsole cushions your step when you're crossing rocky terrain or jagged river beds. The outsole features Astral's stickiest rubber, G. 55, for reliable grip on slippery surfaces.