It is triangle and made from a white or blue fabric special for corsets and able to inclose the entire of arm. Straps along the sling provides extra safety. The arm sling is complitely lined with a cotton woven against being worn out and can be adjusted easily by buckles and has a movable fabric cover with sponge at back of the neck. 3 sizes are available

O-16 / O-16W Arm Sling