Giro Winter Merino Wool Socks Closeout. The Giro Winter Merino Wool Socks are an essential element for the demands of cold weather riding. Featuring a winter weight Merino wool blend, these socks combine a versatile 5.5 cuff length for style and coverage with Cycling Tights with the warm feel and amazing comfort that only wool can provide in cooler conditions. The socks are thin enough to get a precise fit inside your cycling shoes, yet durable enough to wear on and off road any time of year. Plus, they're also naturally resistant to odors and help to wick moisture away from your skin.