specification: Item Type: Knee Brace_x000D_Material: Aluminum Alloy + Rhombus Breathable Fabric_x000D_Measurement Method: Use a Soft Ruler to Measure the Size of the Thigh Circumference 15cm/5.9in Above the Knee Joint and the Size of the Calf Circumference 12cm/4.7in Below the Knee Joint. Choose the Corresponding Size According to the Measurement Results._x000D_Adaptation Range_x000D_1. Chronic Degenerative Osteoarthritis, Also Known As Proliferative Knee Arthritis (Osteoarthritis OA)_x000D_2. Knee Joint Varus or Valgus ("O" Type Leg or "X" Type Leg) Features: 1Knee Protection: Enhance the support effect of the knee joint, reduce the weight bearing of the knee joint, and resist the damage caused by external force to the knee joint. 2Superior Rehabilitation Support: It can maintain joint range of motion and reduce excessive large scale activities. 3Aluminum Alloy Chain: By adjusting the lightweight aluminum alloy chain, the force line of the joint can be changed, the joint side space can be increased, and the friction and wear of the articular cartilage can be reduced. 4Lightweight and Breathable Material: It can prolong wear and tear, making it very easy to use in daily activities. 5Comfortable: Comfort is taken into consideration when designing to minimize skin irritation or sensitivity. PackageList: 1 x KneeBrace 1 x Spanner