WHAT DOES SPEEDFLEX ADULT LARGE MEAN?

New chin strap methods take some having accustomed to, However they’re much better than the outdated-design snaps.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​