Double side neoprene diving mask strap cover One size fits all Soft and very comfortable on the back of your head Protect your hair from the tangling of mask straps while snorkeling or swimming It slips over your existing mask strap, making it easier to slide your mask on A variety of colors are available to personalize your mask To install, simply slide one end of your silicone mask strap out of its buckle, slip it through the strap wrapper, and re-thread the end of the silicone mask strap back through its buckle Specification: Material: Neoprene Length: Approx. 8.07 inch/20.5 cm Width: Approx. 3.54 inch/9 cm Package Includes: 1 Piece Scuba Diving Mask Strap Cover(15 Pack) Note: Mask and silicone strap are not included in the package. Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!