The Alpinestars SP-1 jacket is a performance fit jacket with ergonomic panel design providing supreme fit with minimum exposed seams for added integrity. The SP-1 jacket is constructed from the finest 1.2-1.4 mm full grain leather for excellent abrasion resistance, multiple stitched seam construction for maximum tear resistance, removable CE shoulder and elbow armour, ergonomically placed aramid panels for for optimum fit, Velcro adjustment on the waist, 360 degree waist connection zip for connection to selected Alpinestars jeans and trousers, Moto GP profile ventilated hump for improved aerodynamic and ventilation performance, fully perforated front panels for maximum cooling and comfort, soft neoprene comfort cuff and collar construction, chest and back protection padding that you can upgrade in the future to CE, removable thermal liner, micro injected logos.