Achille's tendon back protection Anti-shock heel protection Anti-stress cuff in LYCRA Foot arch with anti-twist elastic band Anti-bacterial protection provided by the X-Static pure silver fibre Medium density mesh in Coolmax - high breathability, protection, and constant venting Protective layer for toes in CORDURA provides impact protection and reduces wear and tear Ankle protection Left+Right anatomical structure Material: 40% Polyamide (Tactel) 25% Polypropylene 15% Polyamide 5% Polyamide (Cordura) 5% Metallized Silver Fibre (X-Static) 10% Elastan (Lycra)