Providing users with a variety of dependable chin straps, Sunset Healthcare has developed a secure fitting chin strap, in a comfortable and unique design. The material used is neoprene for a soft, flexible fit and uses no Velcro at all. I was suprised how snug and secure it feels when on. A generous sized chin strap cup allows for even the largest of chins to fit properly in the chin strap. The overall elastic and neoprene material allows the chin strap to retain the elasticity and shape. Make sure to put on the chin strap before putting on your CPAP mask and headgear. Place the chin strap cup close to the chin and hold in place, pull up to stretch the straps overhead. You will know if you put the chin strap on correctly if the SUNSET tag is facing out and is located at the back of the nec.