Comfort Cool Thumb Abduction, Left, Size: LrgComfortable splint provides direct support for the thumb CMC joint while allowing full finger function. Unique one piece wraparound support features a contoured strap that wraps around the thumb CMC joint and the first metacarpal for direct joint support. Reinforced stitching allows the splint to be trimmed below the thumb MP joint. Made of thin, 1/16“ (1.6mm) perforated neoprene with a terrycloth liner that helps keep skin cool and comfortable. Latex free.Ideal for treating thumb deformity and contractures due to neurological conditions, median nerve injuries or arthritis, especially where the thumb is held adducted against the palm. A firm, moldable, thermoplastic insert inside the thumb strap allows for custom support. Microwave the thumb strap to soften the insert, then mold it to fit precisely along the thenar eminence crease. Thumb strap helps to abduct and stabilize the first metacarpal and open the thumb web space.Also available:Comfort Cool Thumb CMC Restriction Splint (Black)Comfort Cool Thumb CMC Restriction Splint (Beige)Comfort Cool Wrist and Thumb CMC Splint SizeToddler: MP circumference 4½ “ to 5½ “ (11 to 14cm)Youth: MP circumference 5½ “ to 6½ “ (14 to 17cm)Small: MP circumference 6“ to 7“ (15 to 18cm)Medium: MP circumference 7“ to 8“ (18 to 20cm)Large: MP circumference 8“ to 9“ (20 to 23cm) Product photo may not exactly match the product offered for sale. Please refer to the product description.