Alpinestars KR-1i Cell Back Protector Insert

The extremely lightweight Nucleon KR-1 CELLi 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.

Features

• Triple segmented back shell plate constructed of a polymeric material blend
• Unique cell micro-structure designed for advanced energy absorption, adaptivity, maximum breathability and air flow
• Ergonomic protection plate contours to the natural curve of the back
• Horizontal flexion groves for an adaptive fit in different riding position
• Airmesh on the body side of the protector offers maximum breathability

Construction

• A super lightweight back protector insert developed in three waist-to-shoulder dimensions to cover all body sizes
• High performance polymeric material blend
• Cell Structure for optimized flexibility & excellent weight saving properties

Sizing

• Small: 15.5" x 9.5"
• Medium: 16.5" x 10"
• Large: 17.5" x 10.5"