UV PROTECTION: UV400 lenses block 100% of UVA and UVB, which prevents UV rays reaching your eyes. Tinted lenses cause less squinting and less glare. Non-polarised, category 1 or 2, fine for daytime driving. WHO AND WHERE: Made for men and women, from festival goers and holiday makers to drivers and cyclists. Used for the beach, festivals and summer days out. Pair with sun cream and a sun hat. SIZE AND COMFORT: Compatible with prescription lenses from an optician (not under warranty). Small round lenses 46mm wide and high, with a 10mm bridge and 129mm arms; 23g. Spring hinges and adjustable nose pads ease pressure. LENSES AND FRAME: Scratch resistant coated polycarbonate lenses in a slim metal frame. Stronger than glass lenses, they won't shatter. Each pair is hand checked; photos show the exact pair. ROUND STYLE: Similar to classic 1960s round frames, styled as retro round sunglasses in 18 colours. Includes a microfibre pouch. For a larger fit, see our Ultra Large Round and Ultra Classic.