The Know has a frame made from lightweight, flexible and durable grilamid and is suitable for almost any athletic endeavor.

• The Know has a frame made from lightweight, flexible and durable grilamid and is suitable for almost any athletic endeavor.
• Nylon lenses are treated with Ripel, for clear vision and easy cleaning
• Hydrophilic rubber nose piece keeps the frame firmly in place
• Lightweight, durable grilamid frame