Easily positions the thumb in the desired degree of abduction.Supports the hand in a functional position to help maintain the palmar arches and prevent contractures. Positions the thumb in palmar abduction or slight opposition. Ideal for nighttime positioning for hemiplegia or neurological impairments. May be used during the acute phase of an injury for protection and comfort of the injured hand or wrist. Generously cut to accommodate a flaccid forearm. Small fits MP circumference 6 1/2in to 7 1/2in (16 to 19cm), wrist circumference 5 1/2in to 7 1/2in (14 to 19cm).