Part of the Maui Flex metal collection, Guardrails is a classic pilot that fits most face shapes. The silver rectangular frame comes with grey, polarized lenses. Maui Jim's PolarizedPlus 2 lens technology wipes out 99.9 percent of glare and blocks 100 percent of harmful UV rays. Plus, you'll see color like you've never seen it before. Unlike other metals, MauiFlex sunglasses feature a unique combination of properties which make them ideal for all activities. MauiFlex can 'remember' and go right back to its original shape so those little accidents that may bend or flex your glasses are no longer a worry. MauiFlex is also 25 percent lighter than conventional metals, providing extra comfort for all-day wear.