LeMieux Carbon Air XC Boots Hind Size:Large By simply soaking the boots By simply soaking the boots in cold water reactive crystals swell and retain cold which is then applied to the legs to decrease heat and inflammation are very warm and are a great addition to any of our leather boots for both men and women Cutting edge shock absobtion and tendon support with a flexible polycarbonate strike guard give these boots superior protection to prevent injury while still keeping a super lightweight profile These boots are perfect to withstand the rigour of cross country and can also be used as tough everyday work boots Match with the Carbon Air Front XC Boots for a full set