Hex-Cell protection offers the lowest profile, most ventilated and flexible protection in iXS catalogue. Hex-Cell technology utilizes molded Hexagonal cell structures which both absorb impacts and allow for contraction and expansion. This enables the low profile protectors to move with the contours of the body as it moves, while maintaining a position of optimal protection without hindering movement. Flow XTG protectors combine the ultimate flexibility, without compromising impact protection, in a highly breathable, comfortable and easy-to-wear package, giving the impression that you're not wearing anything at all. Key Features HexCell, hexagonal 3D energy absorbent technology Ventilated and ergonomically designed to perform best comfort and protection Lycra mesh - light, moisture wicking, breathable, Anti-bacterial Silicone stopper EN1621-1:2012 L1 Size Chart SIZE KS KM KL XS S M L XL XXL Circumference - meassure point hand width above knee (cm) 30-32 32-34 34-36 36-38 38-40 40-42 42-44 44-46 46-48 Distance knee toankle (cm) 33-34 34-35 36-37 38-39 40-41 42-43 44-45 46+ 46+ Industry Reviews iXS Flow XTG Knee Guards Review "The iXS Flow XTG knee pads deliver lightweight, breathable comfort with modest protection, making them a solid choice for pedal-heavy trail rides but not for full-on bike park laps.” Read more