bondage mittens
Pouch-like coverings that fasten securely around the wrists, holding the hands closed or palms flat. They are often used in BDSM play such as pony play or pet play. Unlike mittens for cold-weather use, bondage mittens are tubes or bags without a separate thumb and are typically made of leather or some other stiff material to prevent the wearer from grasping through the material of the mittens.
There are several specific styles that differ from the standard look: