Coming in the wake of the hugely successful & iconic Tech 10 & Tech 7 the new Tech 5 is an advanced multi-material, multi-panel construction boot that further strengthens Alpinestars line-up of class-leading motocross & off-road boots. Incorporating an innovative microfiber chassis, which is extremely durable & lightweight, a medial biomechanical pivot system for excellent levels of support & stability & extended accordion flex zones, the Tech 5 affords performance fit & high levels of comfort & durability. Features Upper constructed from innovative, abrasion-resistant microfiber with synthetic polymer on toe box. Main microfiber material offers high levels of water-resistance, durability & enhanced weight-saving. Material ensures consistent fit for long term usage & is easy to maintain & clean. Redesigned instep & Achilles accordion flex zones made from lightweight microfiber for superior comfort, control & support. Contoured advanced polymer core structure envelopes upper boot for structural integrity & abrasion resistance while allowing excellent levels of controlled flex. Anatomically profiled, high modulus polymer shin plate for superior impact & abrasion resistance. The contoured shin plate allows for greater range of fitment & features a Velcro® adjustable panel for a personalized & secure closure. Medial-facing biomechanical pivot system links lower & upper parts of the boot & gives front & rear flexibility & structural support. Both the inward-facing upper & lower panels are constructed from specifically formulated polymer with grip sculpture patterning for maximum contact with bike & enhanced abrasion resistance. Rear TPR gaiter on top of the TPU calf protector gives protection & comfort. Innovative buckle closure system incorporates polymer & fiberglass buckle arms & high-impact aluminum bridge closures for durability & weight-saving. Buckle system features memory & a quick release/locking system with self-aligning design for easy, precise closure & enhanced riding performance & security. All buckles are easily replaceable. The TPU buckle straps are ergonomically profiled to promote high levels of front flexion. Innovative one-piece TPU injected dual compound foot shell with excellent impact & abrasion resistance & unmatched levels of safety. This shell is reinforced by a metal shank inside & toe reinforcement co-injected in harder compound. Exclusive dual compound sole is seamlessly integrated to the multidensity foot base structure with built-in support. The sole offers superior durability, grip & feel while riding. The sole is replaceable. The TPU heel patch connected with shell & lateral/ medial TPU parts, offers protection & support. Soft poly-foam surrounded the ankles & collar offer shock absorbing performance, plus full interior textile lining for comfort. Replaceable anatomic EVA footbed with textile lining on top.