Performance features start with a 1.2mm to 1.4mm embossed premium cowhide chassis that's held together with double overstitching and backed by titanium-reinforced shoulders, C.E.-approved armor at the shoulders and elbows, and a removable high-density spine pad. Airflow through the suit can be adjusted with injection-molded vent intakes located at the shoulders combined and Variable Flow intakes at the forearms with large adjustable exhausts mid-back. A removable insulated vest liner is included for cooler temps. Also helping to improve comfort and fit is a 6-point SureFit adjustment system at the forearms, biceps, sleeves, and waist. Rider mobility is dramatically enhanced with a combination of articulated expansion panels at the upper back and elbows complimented by FullFlexTM panels at the inner sleeves. Final detailing includes snap loops, an ultra low profile Neoprene collar, reflective striping and an 8" zipper for attachment to the matching Speedmaster leather race pants (sold separately). More information on the Speedmaster jacket and their entire line of products are available on the Joe Rocket website.