Alpinestars: CONSTRUCTIONLightweight, stretchable mesh main construction with breathable padded inserts.Soft chest and side padding for added protection and comfortMulti-material streamlined design for superior body fit which enables top to be worn under jersey.BNS compatible with the use of X or A-Straps.32% polyester 28%EVA 15% polyamide 9% elasthan 8% polyurethane 5% polyethylene 3% other.PROTECTIONRemovable CE-certified back protector.According to European statutory law the CE mark is a conformity requirement for the marketing of this product. The following standards apply to this product:Back protector: EN1621-2:2014 Level 1.Shoulder and elbow protector: EN1621-1:2012 Level 1. KEY FEATURESLong removable sleeves with CE-certfied shoulder and elbow protectors.Strategically placed panels to ensure the vest remains well fitted.Ergonomic back protector follows natural curve of the back.Hydration pack compatible with conveniently positioned openings and loops for easy hose routing.Double hose routing option (over shoulder/underneath arm).Rear kidney compartment for convenient additional storage.Full length main front zipper for easy in and out.