Hiking / Trekking / Trail Running / Mountain Racing 71.1% Polyester, 23.4% Cotton, 5.5% Spandex COOLMAX® yarns wick sweat quickly to keep feet dry and cool during long-distance activities Breathable mesh panels enhance airflow and accelerate moisture evaporation Terry cushioning at heel and toe absorbs impact and reduces fatigue on uneven terrain Arch support design provides a secure fit and prevents slipping inside the shoe Seamless toe construction minimizes friction and reduces the risk of blisters 3D heel structure locks the foot in place for a stable, non-slip fit Left/right specific design ensures a more natural and ergonomic fit Polygiene® antibacterial treatment helps control odor and keeps socks fresh longer Size: S / M / LFit: Performance Fit (Low-Cut)