Merino Wool Blend: 52% nylon, 38% wool, 5% polyester, 5% elastane. Ultralight Cushioning: Our most minimalist sock, these socks offer a lightweight, breathable barrier between your foot and shoe with no cushioning. Performance Arch Support: Performance Arch Support fights off strain and fatigue to keep you moving. Seamless Toe Closure: Seamless Toe Closure for an anti-friction finish your feet will love. Graduated Compression: Graduated Compression optimizes blood flow for enhanced performance and recovery. Performance Mesh: Performance Mesh keeps you cool with maximized airflow and breathability.