■ Product Name / Injinji Run Liner Crew ■ Uses / Trail Running, Running, Walking, Cycling, Track and Field, Multisport ■ Material / Coolmax (Polyester 75%, Nylon 22%, Polyurethane 3%) The Injinji Liner Series is a thin inner sock that can be worn as an inner sock. Recommended for single wear for running, walking, cycling, town use, etc. It provides a natural feeling close to bare feet, is comfortable to wear, and helps improve your balance, enabling a higher level of performance.