This is the BodyGlove Silicone Mask Strap w/ Quick Release Adjustable Retaining System BLUE Features: Fast adjustment strap allows for quick and easy adjustments Tighten swim mask by pulling on strap in back Buttons in center are squeezed together to quickly release tension Durable locking teeth ensure a no-slip secure fitting Tangle free pads stay secure and comfortable Fits many different masks including the Body Glove Revolution, Tilos Panoramic Jr., Matrix Color Correction, Aeris Europa, Hyperview Fluid, etc...e split strap design Silicone is slightly discolored but has no effect on function of strap.This is a fabulous price on a quality BodyGlove Silicone Mask Strap w/ Quick Release Adjustable Retaining System BLUE. Quality, versatility, and price