UVEX XC with Durastreme Combo Kit. UVEX Item S99-S3399-Mil3a. Dual 9-base wrap around lens provides over 180 degrees of peripheral coverage. Ventilation channel between the frame & lens vents the eye socket area for fog control. Adjustable temple length for customized fit. Lenses are permanently coated with UVEX dura-streme which delivers anti-fog protection & scratch resistance. Kit Includes: XC eyewear with clear dura-streme Lens, gray dura-streme lens, Op drops, retention strap, pouch/cleaning cloth, crush proof carrying case. Lens Width: 140mm. Lens Material: Polycarbonate. Lens Thickness: 2.7mm. Temple Material: Nylon. Temple Length: 110mm. Temple Set-Back: 85mm. Spectable Weight: 1.3 Oz. Temple Style: Two-Shot. Cushioned. Frame Material: Polycarbonate. Meets ANSI Z87+ (High Impact) Standard. Certified to the Requirements of CSA Z94.3 Standard. Meets Military V0 Ballistic Test for Impact. Lifetime Frame Guarantee.