ALPINESTARS SMX PLUS BOOTS BLACK US 7 5 EU 41 - 3404-1459Advanced 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 An evolution of Alpinestars unique