These pads by French manufacturer Rebotec are made of a very high quality stitched neoprene, and are designed to make medium to long-term crutch use as comfortable as possible by providing extra padding, and reducing friction on forearms.
Each purchase includes both a pair of hand grips, and a pair of cuff pads.
The cuff pads work by slipping over the ends of open cuff-style crutches, and then are secured using a attached sticky-back Velcro patch.
The hand grips fasten vis Velcro under the handle.