From Maui Jim, the Unisex Anuenue 52mm Polarized Square Sunglasses feature: Nylon Classic, Square shape Bridge Type: Single Nose Pad Type & Material: Adjustable, Rubber Hinge Type: Traditional Pin Gender & Sizing: Unisex, Small Lens Shape: Square Lens Material: MauiPure®- MauiPure® is Maui Jim’s most popular plano lens material. Combines optics almost as crisp as SuperThin Glass with ultra lightweight and excellent scratch and shatter resistance. Lens Treatment: Blue Hawaii Rx Able Polarized- Polarizedplus2® lenses eliminate 99.9% of glare, block 100% of harmful uv, and absorb harmful hev, while enhancing colors Approx. 52mm eye/20mm bridge/143mm temple/45mm vetical/6mm plano curvature Imported.