Stretch fabric panels on sleeves, crotch and chest further improve fit and feel. Ergonomic back hump, sculpted for better airflow and performance at high speed. Pre-curved sleeves and legs construction. Localized perforations highly improve ventilation. P Founded in 1963, Alpinestars has built a reputation of innovation and prestige. Now, fifty years later, Alpinestars is synonymous with quality, protection, technology and style. Alpinestars develops world-class technical apparel and footwear for all forms of motorcycling, auto racing and action sports as well as offering a large range of stylish casual clothing. Premium leather main chassis constructed from 1.3 mm genuine bovine leather. Large accordion stretch panels helps movement and comfort on the bike.