Bloc eyewear hornet black sunglasses s11 grey polarised cat 3 lens description a classic design equally at home on the mountain or on the street frame bloc frames utilises tough and compliant karbon tx core injected frames and are hand finished they are flexible lightweight and designed for comfort fit and performance the sports hinge offers both strength and performance lens s11 grey polarised cat3 karbon8 optical class one lens provide max uv protection distortio