The Adventure Spec Flow back armour is level 2 certified, lightweight, flexible and designed to provide protection without compromising comfort. It fits the back pocket of The Supershirt 2.0, The Gravel Jacket and other Adventure Spec jackets. This back armour protector is constructed from high performing, impact resistant Thermoplastic Vulcanizate. It features a honeycomb grid pattern that allows for increased airflow and breathability. It is moulded to follow the contours of your body and is extremely flexible. At just 16mm thickness this armour is certified to EN 1621-2:2014: LV2. Available in two sizes. Flow back armour size 428 fits jacket sizes S/M/L. Flow back armour size 450 fits jacket sizes XL/2XL/3XL. Weight (size 450) = 430g / 15.2oz.