Safe guarding your feet and keeping them warm without the bulk, the men's NRS HydroSkin Socks are the ultimate wetshoe liner. And, hey, they work great with sandals too. The 0.5-mm neoprene core insulates and Safe guard. 4-way-stretch PowerSpan" outer layer gives you enhanced mobility and greater HydroSkin socks are the ultimate wetshoe liner, providing an Additional layer of warmth while helping to Safe guard your feet from blisters. Plush lining and superior stretch of HydroSkin offer unbeatable comfort. With the arrival of the second generation of NRS HydroSkin, it's more durable with greater snag resistance, more nice with stretchier layers, and dries more quickly than the original.