To eliminate any discomfort throughout the day, a soft universally sized polyester undersleeve and extra padding is included to prevent the MCP thumb splint from rubbing or chafing against your skin. Rigid thumb splint is made out of a latex-free, perforated polyamide plastic and an elastic / medical-grade Velcro wrist strap, making it both durable and waterproof. Saddle joint immobilizer can be worn beneath gloves and throughout the day for support while typing or during low-impact exercises and activities, for example. Brace prevents thumb flexion and extension, helping alleviate pain associated with post-op recovery, arthritic thumbs, De Quervain’s tenosynovitis, gamekeeper's thumb, skier’s thumb, osteoarthritis, trigger thumb, ulnar collateral ligament (UCL) injuries, fractures, dislocations, sprains, etc. SIZING: To choose your size, carefully measure the circumference around your thumb knuckle at the widest point, in inches. Size LARGE LEFT fits your left hand and thumb knuckle circumferences between 3"-3 1/2". IF BETWEEN SIZES, ORDER THE SMALLER SIZE.Product Care Instructions: Hand Wash Only. Special Feature: Adjustable. Sport: Walking. Unit Count: 1.0 Count. Material: Plastic. Color: Black. Age Range (Description): Adult. Specific Uses For Product: Ulnar,Arthritis,Trigger Thumb,Osteoarthritis,Tendonitis,Fractures,Skin. Size: Small Right. Brand: BraceAbility. Best Sellers Rank: See Top 100 in Health & Household. : B076HF9SN8. Manufacturer: BraceAbility. Date First Available: October 16, 2017. Department: Unisex-adult. Item model number: 11F0201LL. Package Dimensions: 6.93 x 5.59 x 2.24 inches; 1.06 Ounces. Is Discontinued By Manufacturer: No.