Y-Shaped Rubber Head Harness is attached to metal clips around the connector of the face mask. The Rubber Head Harness is a Y-shaped rubber strap keep the face mask in position during use over the face. The Head Harness needs to be kept as loose as possible because with firm tightening the mask may cause pressure damage to face. Y-Shaped Rubber Head Harness comes in different specifications to cater to individual requirement.