Windbreak Sleeve And now for something completely different...socks for your arms. The Windbreak Sleeve is a protective shield to enchance circulation in the arms while on long bike rides. Our experts swear that it makes a difference in performance. FreshGuard® eliminates ordors • Dri-release® dries super fast • Snug fit for enhanced circulation Content: 54% Stretch Nylon, 44% Wool Dri-release® (88% Polyester, 12% Wool), 2% Lycra® Spandex |