evo.com | Fischer Alpine Touring Ski Boots > A solution for the hardest chargers out there who feel normal "130" flex boots aren't stiff enough, the Fischer RC4 Pro MV DYN BOA Ski Boots go all in with a 140 flex, Phatt Maxx race strap, a genuine ZipFit adjustable liner, and BOA(R) lower closure over the lower shell, which gives you a much improved and more consistent wrap over the forefoot. Designed around a 100mm last to fit most average volume feet, this model includes tech fittings in the toe for compatibility with hybrid bindings like the Shift, Duke PT, and CAST system. Adjustable RC4 ZipFit(R) Innerboot It is a "boot" that goes inside the ski boot shell! Co-branded product focused on durable, uncompromising performance with dynamic cork composite fit adjustment. Merino lined neoprene toe box ensures feet stay warm. Automatically adds at least 10 flex points of stiffness. Phatt Maxx Strap 50mm wide power strap enhances power transfer and pressure distribution across cuff and liner tongue. Simple cam strap allows strap to be locked down tight but also easily adjusted. Carbon Infused Cuff Pebax(R) Rnew cuff reinforced with carbon fiber for increased stability and stiffer flex. The best-of-the-best for skiers who demand ultimate performance. ISO 23223 GripWalk(R) Sole GripWalk(R) soles (ISO 23223) offer end users the ultimate in natural walking comfort, safety across slippery terrain, and ski performance. This is achieved through pronounced rounded shape and convex rib profile built with co-polymer rubber material. Flex: 140 A very stiff flex for advanced to expert level skiers | Fischer RC4 Pro MV DYN BOA Alpine Touring Ski Boots 2025 - 24.5 in Yellow | Rubber/Neoprene
