CFF+1 Soft and stretchy floating Suiters.
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.