One of the most important items to include in your save-a-dive kit is a spare mask strap. You're fully suited up and are ready to make a giant stride entry off the back of the boat in "Saint Somewhere". As you put your mask on to start a dive your mask strap breaks! Always have a spare, don't let a broken mask strap ruin your day of diving. Keep one or two spare straps in your dive bag or save-a-dive kit, the dive you save may be your own. This Cressi Silicone Mask Strap is a wide split strap design that offers comfort and a great seal of the mask on your face. Straps are easy to install. Replace your old strap or purchase it as a spare. This is a great save-a-dive kit item and will keep you diving in that unfortunate circumstance that your old mask strap breaks. This strap is designed for the Cressi Big Eye and Focus Masks (see SKU's: CSBMBEEBHD, CSBMBEE, CSBMB, CSBMBEC, CSBMBE, CSBMBEEBBK, CSBMFHDBK, CSBMF).