Valken Tactical Face Mesh Helmet Attachment.  This pair of strap attachments works with most, if not all, wire mesh lower masks. The straps allow you to attach a mesh mask directly to a helmet with its clips and velcro.  Fully adjustable and easy to wear.  Much better than the head straps, as it mounts to your helmet instead.  Very comfortable, QD removable.  Very easy to install and attach. Comes in various colors.  Works with Warhead Stalker, Valken, Bravo, and other popular wire mesh masks with loops at its rear side ends.

Your fast style helmet must have the clip attachments and rear velcro to work correctly.