Finished to exacting specifications and machine polished with high-velocity micro particulates, the engineering behind PHENOM is only outdone by its artistic style, featuring soft thermoplastic rubber tipped temples, aluminum-magnesium frame construction, hidden spring hinges, lightweight construction, proper weight balance, micro-engineered lens locks, adjustable floating nose pads, proprietary patented GUNNAR lens material and tint that blocks harmful blue light and 100% UV light, anti-reflective lens coatings on both sides, silicone hard coated lens to prevent scratching, Asian Fit compatibility, and a prescription range of -7 to +4; with specs including lens width of 55 mm, lens height of 31 mm, nose size of 18 mm, frame width of 135 mm, temple length of 134 mm, and a weight of 21 grams (without packaging), the purchase includes a clamshell glasses case, microfiber pouch, microfiber cleaning cloth, and a 24-month warranty.