The Injinji Trail Mid Weight Crew toe socks are engineered for the uneven and unpredictable terrain of the trail to offer the best fit, feel and protection in any shoe. They are built to handle the impact of dirt paths and rocky trails with a protective cushion and midweight design, making them suitable for trail running, off road running, and hiking. Fibre content: Fibre content: 39% COOLMAX® 58% Nylon 3% Lycra®