Alpinestars Youth Nucleon KR-Y Back Protector Speed Flame ERZ chain is upgraded with

ERZ chain is upgraded with exclusive Super Dai Hard pins put through a special patented heat-treatment process that makes them 1

it is radically redesigned

Heavy duty spring tool won't break or straighten out

Reinforced structure

5200mAh rechargeable lithium-ion battery kit with a pair of heated soles and a "Y" wire for connecting the battery to the soles

Alpinestars Youth Nucleon KR-Y Back Protector Speed Flame ERZ chain is upgraded withAlpinestars Youth Nucleon KR Y Back Protector Features Extremely lightweight, flexible and ergonomically profiled for an optimized anatomical fit Incorporates an airflow channel system for cooling and comfort Soft, viscoelastic PU foam compound construction Kidney belt features dual hook and loop closure system Ergonomic protection plate contours to the natural curve of the back, ensuring an optimal fit when in the riding position Adjustable,