RecSpecs Maxx21 - Medium 51 / 17 Colour Options:Bright Blue Black » Flexible O Matter frame

» Flexible O Matter frame conforms to your face with optimized comfort and fit

- Triple-layer polar fleece foam assures all-day comfort

The widest photochromic range to adapt to changing light conditions

» 9-point lens retention system secures lens in frame

Engineered with a revolutionary quick-release lens-changing system seamlessly integrated into the frame

RecSpecs Maxx21 - Medium 51 / 17 Colour Options:Bright Blue Black » Flexible O Matter frameRecSpecs Maxx21 The Maxx 21 is a prescription ready sports glasses frame designed for athletes who need certified protection in a narrower fit. Built to meet or exceed ASTM F803 impact resistance standards for all Ball Sports. With narrow sizing, helmet compatible positioning, and a double slide adjustable strap, it is especially well suited for younger players in fast moving sports. Frame Sizes Small: 48 x 17, Depth: 32. 3mm. Medium: 51 x 17, Depth