Targeted Breathable Support (Tbs), Knee And Cartilage Support, 2x-large Ideal for treatment of patients who suffer from sprains, strains, instability, and edema from injury or post operative symptoms of the knee VentiPrene Durable, lightweight, 1/8" thick perforated neoprene body allows the skin to breath while providing compression and warmth without the overheating that most neoprene can cause. 4 way stretch quilt pattern lining creates overlapping channels inside the support allowing for additional airflow and moisture control. VentiPrene is laminated with polyester and nylon jersey for durability on the outside and comfort on the inside.Contoured Silicon Massagers Soft, knobbed massager inserts strategically placed to prevent migration of the support and gently massage soft tissues to stimulate receptors during muscle-tendon transition further enhancing proprioception and joint stability. Open Patella Design Patella opening to allows for pressure free movement of the knee. A padded horse shoe insert is incorporated to surround the patella for additional support and edema control while also adding migration control.New combination of soft durable laminates and perforated breathable neoprene for "breath-ability you can see"This support provides mild compression and added proprioception increasing joint stability decreasing pain and swelling to keep the patient active The TBS ELBOW is fitted by measuring the forearm circumference two inches below the elbow.Size: Small: 12" – 13.5" Medium: 13.5" – 15" Large: 15" – 16.5" X-Large: 16.5" – 18" 2X-Large: 18" +" Size: 2X-Large