Croakies Floater Sunglass Strap

17" long x 1 3/4" wide High Quality Neoprene Unique back stitch prevents thread failure Large Profile for Maximum Visibility Washable Proudly Made in Bozeman, MT with Domestic and Imported Materials CFF 2 (floats plastic frame/glass lens or metal frame/plastic eyewear) CROAKIES Floatation Factor (CFF) The amount of flotation needed to save glasses from sinking CFF+1 - Floats Plastic Frame & Plastic Lens Eyewear CFF+2 - Floats Plastic Frame/Glass Lens or Metal Frame/Plastic Lens Eyewear CFF+3 - Floats up to Metal Frame/Glass Lens Eyewear CFF+4 - Floats up to Metal Frame/Glass Lens Eyewear Weight of glasses varies. Always test for flotation before using on water.