Comfort Cool® Ulnar Wrist Support - Versatile splint can be used to prevent ulnar deviation or wrist extension. The Comfort Cool Ulnar Wrist Orthosis is ideal for tendinitis, wrist instability, ulnar drift problems or triangular fibrocartilage complex tears. The 1/16in (2.0mm) perforated neoprene offers support without excessive bulk or warmth. Neoprene can be trimmed and customized easily. Double-layer insert pocket protects and supports either the dorsal or the ulnar side of the wrist and helps prevent unwanted movement. Soft, terry cloth liner feels good against the skin. Included 3/32in (2.4mm) thick Encore thermoplastic insert offers firm support and restricts wrist movement depending on placement. Easily custom fit the insert: heat in warm water, or microwave the insert while it is in the splint. Allows the thumb and fingers to move freely. For dorsal support, simply order the splint size for the opposite hand.