MSA Fas-Trac III Standard-Sized 4-Point Replacement Suspension is specially designed for use with V-Gard, V-Gard 500, V-Gard GREEN and SmoothDome? helmets. It features graspable ratchet with ultra-smooth rotation and steadfast hold for convenience. It has three levels of nape strap adjustment for comfort fit and flush rear lug attachments for eliminating pressure points.