Thanks to its durable PC frame, the PRISM model offers excellent protection and is great value for money | Fully recyclable, ultra light weight (only 22g), rimless polycarbonate frame | Optically correct, single piece distortion-free lens | Advanced Lens Shielding (ALS) Anti-fog/Anti-scratch coatings on both sides | Approved to AS/NZS 1337.1.2010 for Medium Impact Protection