ALPINESTARS SMX-6 v2 Vented Boots - Black - US 6.5 / EU 40 2223017-1102-40 Yamaha YZF Airbox Kit Machined mid pipe to head

Machined mid pipe to head pipe joint for a better

Mid-weight fleece

Padded landing zone for increased comfort

Snap connection system allows integration of Nucleon Race Back Protector for the ultimate in protection (for use without Tech-Air® system)

ALPINESTARS SMX-6 v2 Vented Boots - Black - US 6.5 / EU 40 2223017-1102-40 Yamaha YZF Airbox Kit Machined mid pipe to headBoot upper incorporates an innovative front and rear bellows and rear calf zone for superior levels of flexibility Boot upper is constructed from microfiber for durability and abrasion resistance Ergonomic forefoot streamlining enables greater control of the bike's controls and provides a superior, wide ranging foot profile for excellent fit and comfort Thermoplastic Polyurethane (TPU) lateral ankle brace provides a biomechanical support between the