Tendon guard made of impact-resistant plastic lined with perforated neoprene that lets through air and heat. The inside made of 3D polyester mesh helps maintain a pleasant temperature and lets out surplus heat. Ventilation holes at the back of the bowl allow surplus heat to escape. Shaped bowl with a cutout that allows the bowl to form better around the vertebrae. A cut out back for greater freedom of movement. Edge band made of a soft and flexible 100% percent polyester lycra. Feel free to match it with bakstrykkappa art. no. 610118. Comes with washing bag.