Check the listing for details. Comfort Cool Thumb CMC Restriction Splint, Right, Medium +. Condition: New. Listed at 32.95 USD. Provides direct support for the thumb CMC joint while allowing full finger function. ---Patented contoured neoprene strap wraps around the thumb CMC joint and the first metacarpal for direct CMC joint support. ---Specifically designed for osteoarthritis and medial subluxation of the thumb CMC joint. ---Reinforced stitching allows the splint to be trimmed below the thumb MP joint if desired. ---Provides gentle compression that helps relieve thumb discomfort associated with CMC joint arthritis and/or instability, tendinitis or repetitive motion. ---Made of thin, 1/16" (1.6mm) perforated neoprene with a terry cloth liner that helps keep skin cool and comfortable. ---Plus sizes are a half size bigger in the hand and a full size larger in thumb circumference to accommodate enlarged thumb conditions. ---Not made with natural rubber latex.