The Nucleon KR-1 Cell back protector incorporates race-orientated back protection. Featuring a hard plastic lattice structured shell, this innovative back protector is uncompromising in safety and performance. Ergonomically profiled for sport riding with superb ventilation, the Nucleon KR-1 Cell is extremely lightweight and breathable. * Cell Technology back protector constructed from a high-performance polymeric material blend for optimized flexibility and excellent weight-saving properties. * Extended lower back protector offers more protection to the rider. * Highly perforated for maximum breathability and ventilation. * Developed in three dimensions for size-shoulder to cover all body sizes. * Horizontal flex grooves for adaptive fit in different riding positions. * Adjustable and detachable elastic straps with a snap-fit adjustment system for comfort. * Compatible with Nucleon KR-C protection by removing adjustable straps. * Compatible with Nucleon KR-TB for extended lower spine protection. * Height-adjustable kidney belt with hook-and-loop closure system for easy and secure fastening. * Soft Bio-Foam padded chassis for maximum comfort.