ALPINESTARS SMX+ Boots - Black/White/Red Fluorescent - US 6 / EU 39 2221019-1231-39 2-Seater Audio KIt Zone 3 with Rocker Switch Consistent spring performance

Consistent spring performance

Composite materials and front support bar provides a blend of rigidity and controlled flex

Innovative design helps with increased bottom to mid-range power

Waterproof inner bag for ION S tail bags

ALPINESTARS SMX+ Boots - Black/White/Red Fluorescent - US 6 / EU 39 2221019-1231-39 2-Seater Audio KIt Zone 3 with Rocker Switch Consistent spring performanceAdvanced microfiber upper construction for lightweight high performance protection and superb levels of flexibility Front flex area is constructed with a soft microfiber for improving abrasion resistance and natural forwards and backwards movement Flexible accordion microfiber on Achilles gives enhanced natural movement Outside entry exit has stretchable accordion panel for a close fit and ease of entry and removal. Contoured high modulus shin plate