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