This boot features our Dynamic Response System which was developed for the most rugged high altitude conditions. It provides the protection, the response, the rigidity and the support needed when battling ridgeline conditions of rock, jagged debris, packed snow and ice. In short, it’s made for serious hiking.
- GORE-TEX (GTX)100% waterproof and breathable, GORE-TEX liners ensure that no water gets in, while allowing sweat and moisture to get out.REMOVABLE ORTHOLITE FOOTBEDThree layers of varying density are combined for maximum cushioning and support.
- The entire footbed is made of open-cell polyurethane for better heat dissipation and air circulation.PU MIDSOLEWith integrated polypropylene board to provide support underneath the entire length of the foot.VIBRAM® TSAVO OUTSOLESuperior traction in rugged, high-angle terrain.
- DYNAMIC RESPONSE SYSTEMEngineered for optimal stability, the unique framework allows for springboard return, even in cold environments, while the dual-density midsole provides superior shock absorption and durability.
- HOW IT FITSThe 851 last is an update to our popular 850 last. This last fits true to size with an athletic and supportive fit while providing ample room in the toe. Offering a specific heel shape that locks the heel in place for better fit and comfort on the back end of the boot, this supportive fit is ideal for those needing high mileage performance from their gear.