HELIOSPHERIC™ LENS: Blocks out 100% of the harmful UV-A, UV-B and blue light. This polycarbonate lens technology is engineered into the actual lens, so it can't be diminish by rubbing or scratching. The Heliospheric™ lens is impact and shatter resistant to provide distortion free optics. TPR™ NOSE & TEMPLE GRIPS: TPR™ is a rubber material that resists oil and sweat. The no-sweat nose and temple grips will keep your shades in place, even in the heat of battle. THERMO-CARBONATE™ FRAME: Retains its shape and flexibility under all extreme weather conditions, while providing a strong, durable shatter resistant frame. This lightweight, shock resistant Thermo-Carbonate™ frame has built in elastomers that will allow the frame to bounce back to its original shape and withstand impacts. HAND-TOOLED ACETATE FRAMES: The acetate process allows us to be more creative and gives the frame a unique style with more vibrant color combinations. Each frame begins on a laminated sheet, routed and hand shaped. The wire injected temple cores, logos, and hinges are hand-set to perfection to create a fine piece of art. 5 BARREL REVOLVER™ HINGE: This hinge adds comfort and is more durable than a standard optical hinge. The quality of the stainless steel hinge says it all...it will last a lifetime.