The Boost LED Mask comes with two adjustable Velcro straps that allow you to comfortably wear the mask.To fit the mask, thread the shorter strap through the inlet holes on either side of the mask as shown in the illustrations.The longer strap fits through the top of the loops on either side of the mask, as shown in the illustrations, and sits on the top of your head.Loop the straps around your head and secure firmly.Adjust if necessary.