Body Armor® Night Splint, One Size Fits Most, 1 Case of 12 Arthritic Gloves high density foam Oxygen Masks high density foam Epi Lock features a unique patented 2 strap system * The strap near the elbow supports deeply buried extensors and works with the forearm strap to provide exceptional support and pain relief * The non elastic straps are worn comfortably snug * When muscular force is applied the extensors automatically enlarge causing the straps to tighten * Universal left or right * Measure forearm circumference for sizing * Fits 12 15 circumference * HCPC: NOT COVERED Better design and better fit mean you are more likely to use it for as long as necessary lightweight design that is cooler and more comfortable than traditional posterior splints