Bloc Eyewear Chameleon Shiny Black Sunglasses (SG12 Grey Grad/ Cat 4 Lens) Description: The changing face of the Chameleon is one of a kind. This multifunctional style has a removable gasket designed to protect from peripheral light incursion. Conforms to EU Standard BS EN 1836: 2005 + A1:2007 Lens: SG12 Grey Graduated Cat.3 Karbon 8 Optical Class One lens provide MAX UV protection. Distortion free & virtually indestructible. Frame BLOC frames utilises tough & compliant KARBON TX bi core injection frames & are hand finished. They are flexible lightweight & designed for comfort fit & performance. The sports hinge offers both strength & performance. The fully adjustable hypoallergenic nose pads & the non-slip hypoallergenic temple tips are designed for comfort & fit. Specifications: This multifunctional style has a removable gasket designed to protect from peripheral light incursion & secured by a revolutionary globally patented micro magnet system. Transforms from pure mountain sport to street level by simply removing the gasket & changing the malleable arms.