Light-weight Full Frame Design Polarized Lenses Eliminate Glare and Enhances Vision UV400 Lens Filters Eliminate the Harmful UV Rays of the Sun No-slip Nose Pieces and Rubber Arms Offer a Comfortable Fit Floating TR90 Polymer Frame for Long Lasting Durability These are a full frame style made with the highest grade of TR90 available. Jammed with rubber ear and nose pieces to stay planted. Step on them, smash them, or sit on themthey wont break. Wear them in the boat? If they fall offno worries. They FLOAT!!!