The extremely lightweight, CE-certified KR-CELLi Protector insert features an articulated back shell plate for flexibility and riding fit, plus an advanced micro-structure cell design for efficient impact energy absorption and high levels of airflow. • The triple segmented back shell plate is constructed from a high performance polymeric material blend for optimized flexibility and excellent weight saving properties.• Unique cell micro-structure designed for advanced energy absorption, adaptivity, maximum breathability and air flow.• Back Protection – EN 1621-2:2014 Level 1• The ultra-lightweight Nucleon KR-CELLi Protector insert is developed in three waist-to-shoulder dimensions to cover all body sizes.• The back protector’s structure design and structural change from center towards the outside provide the perfect balance between force dispersion and energy absorption.• Ergonomic protection plate contours to the natural curve of the back ensuring optimum fit while riding.