DO Low sunglasses Do Low is a sports & leisure frame designed to work both on & off the bike. The frame is injected in grilamid for low weight & durability. The adjustable nosepiece made with hydrophilic rubber keeps the frame firmly in place & all lenses have exeptional optical performance. The lens provided is grey with a VLT of 15% (Cat 3) – a neutral tint that is relaxing for your eyes for long term use.