ALPINESTARS Nucleon Flex Proi Full Back Protection Insert - Transparent Smoke/Red - Small 6526323-003-S Torque Spacer Kit it has been engineered to

it has been engineered to accommodate the Tech-Air® 5 Airbag System

All necessary hardware included (tank decals not included)

Designed and constructed specifically for a women's performance fit Boot upper design incorporates an innovative front and rear bellows and rear calf zone for superior levels of flexibility

If you are competing in a AMA Supercross or AMA Motocross series

ALPINESTARS Nucleon Flex Proi Full Back Protection Insert - Transparent Smoke/Red - Small 6526323-003-S Torque Spacer Kit it has been engineered toHybrid technology Alpinestars' Nucleon Cell and Flex technologies providing ventilation and flexibility Ergonomically contoured dual zone outer shell Advanced polymeric blend with a solid cell structure core framed by a more flexible 3D cell structure Nucleon Flex technology layer on the central back zone More protection coverage in critical area Lightweight, ventilated and ultra comfortable technology Rigorously tested and certified for proven