The top of Alpinestars touring range jackets, equipped with GORE-TEX membrane that provides an excellent water resistance and an excellent breathability and ready to support the Tech-Air Vest airbag system. Big Sur presents an innovative construction that welds the outer fabric layer with the Gore-Tex membrane. This will ensure a total waterproof and breathability power, without adding weight to the jacket due to the absorption of water. In addition the laminated structure allows the jacket to give you a direct ventilation since the front and rear air intakes go under the waterproof membrane. This innovative construction prevents the membrane to block the air flow, and thus to ensure an excellent ventilation even in the hottest season, but at the same time maintaining an excellent impermeability thanks to sealed zippers. The Tech-Air system predisposition, the direct ventilation, the Gore-Tex membrane and the removable thermal liner make the Big Sur one of the most complete and protective touring jacket.
PLEASE NOTE: For road use, it is only possible to equip the Alpinestars Tech-Air Vest airbag system, as road vehicle variables are different and the activation algorithm was developed according to data reported by motorcycle riders user of Touring, Sporty and Naked motorcycles, and the use of the Racing version does not guarantee 100% opening of the airbag as the system is designed to activate in the event of the unnatural movements of the pilot during the drive on the road.
However, the Tech-Air system does not need GPS tracking to run properly, which allows the system to be constantly active and ready to run both on the track and the road, without the need to update it with your position everytime you use it in different places.