Neomark For JVC Action Camera Elastic Adjustable Anti-slid Head Helmet Strap Mount For JVC GC-XA1 ADIXXION & JVC GC-XA2 ADIXXION Adapter And Screw Included Waterproof head-strap camera mount that works with JVC GC-XA1 ADIXXION & JVC GC-XA2 ADIXXION One size fits all; fits directly on head or over most helmets Ideal for hands-free filming when you want a point-of-view angle Adjustable nylon straps with non-slip rubber inserts; polycarbonate buckles Measures 6 to 7 inches in diameter; stretches to 12 inches in diameter