This is the ScubaPro Comfort Strap for Dive MasksFeatures: Ideal addition to any diving or snorkel mask. Uses the same design concept as a strap used on ski goggles. Enhances mask comfort and protects hair from knots and pulls. Easy to attach, easy to use. One size fits all for total convenience. Available in a choice of five colors Upgrade your diving or snorkeling mask with a new Comfort Strap. Similar to a ski goggle strap, the Comfort Strap is comfortable, protects hair from being pulled, and attaches quickly and easily to a variety of mask models. Kids also love them! Available in lots of stylish colors.