H2Optix Thunderbolt Polarized Sunglasses. Sea faring shades made to eliminate that harsh water reflection glare! And they're durable enough to withstand the direct impact of a hammer! Now that's what I call "tough as nails". Simply put, for all your swashbuckling adventures on the water, H2Optix gives you everything you're looking for in eye protection including advanced water sheeting action that reduces lens spotting from water spray. First-rate first mates for your eyes: High-performance polarized lenses eliminates intense glare, provides 100% UV protection and awesome clarity; Polycarbonate lenses are 20 times more impact resistant than glass with a third of the weight; Lightweight, nearly indestructible frames weigh less than 1 oz.; FLEX-GRIP system softly grips your face to keep your shades in place when the action gets heavy; Small to medium fit.; Get yours now! H2Optix Thunderbolt Polarized Sunglasses