Designed to diffuse pressure over the ears, the glasses automatically adjust to the head and facial features of the wearer. Weighing less than 1 ounce, the durable, snug-fitting, flexible nature of SecureFit offers a more comfortable and personal fit than old-fashion one-size-fits-allin glasses that are rigid and unyielding in design. These glasses adapt to the wearer, rather than the other way around. The snug fit also keeps the glasses securely in place as the wearer looks up and down or side to side, eliminating the need for frequent repositioning of the glasses due to head movement. Plus, these safety glasses help eliminate the expense of stocking multiple frame sizes at jobsites to accommodate different people. The anti-fog coating on the lenses helps reduce the chances of fogging in hot and humid environments. Anti-fogging properties help maintain visibility and reduce the need to remove glasses to wipe away moisture from the lenses. These glasses come with important safety features for overall eye protection, including impact resistant polycarbonate lenses that absorb 99.9% UVA and UVB rays up to 380 nm. The glasses also meet the requirements of CSA Z94.3and ANSI Z87.1-2015. This protective eyewear weighs less than one ounce for lightweight comfort. 5-7 day lead + transit.