Arm & Shoulder Supports - Left, Large Wrist & Forearm Splint, Abducted Thumb: Left, Large Immobilize Injured Wrists and Thumbs with Our 8" Wrist & Forearm Splint with Abducted Thumb Nylon outer material is lined with a plush foam for exceptional patient comfort, dual stays support both the palmer surface of the wrist and the extensor surface of the thumb, thumb support adjusts with hook and loop closure, three forearm straps secure with loop lock closure for a high level of compression.