Armor Vision revolutionary and much hyped (all for good reason!) Tear off replacement system is taking the World by storm.. Super hard coating with hydrophobic properties mean this product is a industry innovator.. Mud, Dust and Sand that does stick, wipes away cleanly in almost all conditions! Tried and tested by top Athletes World wide with more joining the revolution daily.. This is the 50mm version that fits most modern larger goggles like Oakley Airbrake, Scott Prospect and 100% Armega and many others