The Neo G Angora & Wool Knee Warmer & Support is designed with naturally insulating material which helps to retain heat in the knee region to keep muscles and joints warm. It helps gently support the knee complex to help with injured, weak or arthritic knees. Offering mild and comfortable support during sporting or occupational activities. The support helps keep affected area warm after injury and during recovery e.g. strains and sprains. SIZING GUIDE - To size, measure knee circumference (cm) - Small: 28 - 32 cm; Medium: 32 - 36 cm; Large: 36 - 40 cm; X-Large: 40 - 44 cm; XX-Large: 44 - 49 cm.