The Alpinestars Winter Socks have excellent levels of moisture-wicking and breathability, plus density cushioning. The MTB Winter Sock is constructed from a lightweight Thermolite® material for excellent insulation and heat retention on cold weather rides. Alpinestars Winter Socks Features Constructed from lightweight Thermolite® material for excellent insulation, moisture-wicking and breathability. Elasticated cuff prevents slippage and reduces material bunching. Arch and calf support bands for improved performance fit and comfort. Density cushioning on heel, toe, insole and Achilles area for comfort and durability. Low calf sizing for optimized warm weather coverage. Anti-bacterial, odor-resistant.