This is the House of Scuba Soft Padded Mask Smack Strap with Velcro Straps Features: Easy to install Easy to Adjust Provides extra comfort Will help float most masks One size fits all Never pulls or tangles your hair Install strap so velcro ends attach to fluffy velcro side, so about 2 attaches to the fluff lining on either side. If velcro exceeds 2" the stretch of the neoprene will be hindered causing less stretch and less comfort.