The wraparound supports are constructed of a thin, 1/16" (1.6mm) perforated neoprene material with a terry cloth liner for skin comfort. The splint can be trimmed below the thumb MP joint if desired due to reinforced stitching. Specifically created for osteoarthritis and medial subluxation of the thumb CMC joint, it offers gentle compression to relieve thumb discomfort caused by CMC joint arthritis and/or instability, tendinitis, or repetitive motion. Plus sizes are available for individuals with enlarged thumb conditions, with the hand being a half size bigger and the thumb circumference being a full size larger. The specific product mentioned is the Plus Medium size, which has a measurement of 7.25"-8.25" (19-21 cm), is black in color, and is designed for the left hand. The product's unique identifier is the UPC code: 768627795586.