The bands of the Knightsbridge Sleep Solutions chin strap  lift *vertically* from under the jaw to work with the natural rotation of the jaw.  (In contrast, traditional chin straps wrap around the tip of the chin and force the jaw backwards into the jaw joint, which is uncomfortable and long term use can cause joint damage.)  And just as importantly, this chin strap has two bands ... an elastic band and a non-elastic band, the blue band is non-elastic what this does is it keeps your jaw from lowering you put this on snugly  and then the elastic band (the white one) and you just provide a little gentle upwards force the thing to notice is it goes from under your jaw and lifts vertically so it works with the natural rotation of your jaw which is partly why it's so comfortable.