Fit & Design: Medium/Large Fit TRFE Lightweight floating frame is buoyant for quick response when they fall off your head and into the water Premium Hobie(R) Polarized Hydro 360 Lenses. Dual coated Hydrophobic and Oleophobic on the front and back of each lens Integrated hinges Lifestyle Frame with 6-Base Polycarbonate lenses Rx Friendly Specs: Lens: 54mm Nosebridge: 18mm Temple Arm: 138mm 100% Protection from UVA, B & C Rays