New Patagonia Men's Nano Puff Vest Forge Grey Size Small Grey 84242 SP17 Black Orange Blue Leather and Sateen upper for expert craftsmanship Leather and Sateen upper for superior support and breathability Ergonomically designed insole to match the contours under the foot for superior comfort over the cleat design eliminates the discomfort associated with traditional internal bracing Allows for a full active range of motion and engages its protective component only when ankle enters danger zone Unlike traditional braces ™ (Produced Using Reduced Emissions) technology which provides excellent warmth for its weight