The latest development from Sedici, the lightweight, flexible Aria Pro back protector is CE certified Level 2 protection. Contoured to fit and move with the spine while offering the best Level 2 impact protection, it couldn't be easier to install this upgrade into garment pockets provided on all Sedici leather and textile jackets. Molded to allow maximum airflow in high density, impact absorbent materials, the Sedici Aria Pro perfectly provides for rider comfort and safety the latest CE specification. CE certified Level 2 EN1621-2:2014 Contoured for comfort and fit Perforated for breathabiltiy Size SM is recommended for Men's jackets up to size 40 or XS-MD Size MD-LG is recommended for Men's jackets size 42 and larger or LG-5XL