Class 1 optical lens suitable for extended wear. Design provides excellent coverage and a wide field of vision Offers excellent protection against ultraviolet (UV) radiation Lightweight design (18 g) 3M™ Pressure Diffusion Temple technology for a secure, comfortable fit A wrap - around design that enhances fit security and offers slip. The 3M™ SecureFit™ Safety Glasses consist of a rimless eyecup and a fixed - length temple. It has an integrated side shield for added protection. The temples incorporate 3M™ Pressure Diffusion Temple technology, which helps distribute pressure over the ear to improve comfort when wearing the glasses for a variety of tasks. This innovative design improves comfort and secure fit.