Axial AX2 Air Back Protector The AX2 Air Back protectors are designed for unparalleled ventilation, making them an ideal choice for hot summer rides. Compatible with mesh jackets, they maximize airflow while offering CE level 2 protection. The unique geometric lattice design efficiently disperses impact energy, ensuring maximum protection without heat accumulation. Slightly smaller in height and width, they fit back protector pockets more effectively. Contrary to other versions in the AX2 series, they cannot be trimmed and feature Newtonian material that maintains its protective properties across various conditions, distinct from the non-Newtonian AVP material that hardens upon impact to distribute force. Features: Ventilated hyper elastic injected PU polymer Lightweight, ergonomic design Impact energy is evenly dispersed Thinner and more ventilated than AX2 back protectors 63 more ventilation than AX2 CE Level 2 Certified Meets the requirements of CE EN 1621-2:2014 Level 2 Fitment: Bilt: All jackets fit MD back protector, with the exception of the Arcadia Women's Jacket which fits SM back protector Sedici: All jackets fit MD back protector Street & Steel: All jackets fit MD back protector, with the exception of the Nightstar Women's Vest which fits SM back protector Reax: Xs-Md men's jackets fit MD back protector, Lg-3Xl men's jackets fit LG back protector All Reax women's jackets fit MD back protector Other Brands: Measure pocket and choose a size based on the dimensions below Dimensions: SM - 12.6 x 8.6 X .59 - (32cm x22cm x 1.5cm) MD - 14.9 x 11 x .59 - (38cm x 28cm x 1.5cm) LG - 16.9 x 11.8 x .59 - (43cm x 30cm x 1.5cm)