Details Fit Last: 100 mm – Medium volume forefoot width that doesn't sacrifice ankle and heel hold; a great balance between ski control and comfort for average volume feet. Flex Flex: 130 – A very stiff flex for expert freeriders seeking precision and response. Liner Full Custom T1 Liner – Pre-shaped around the ankle for a snug, accurate fit. Customization affects the internal padding for enhanced foot wrapping and comfort, as well as the external liner materials for enhanced precision and power transmission. T1 version features two separate bi-material zones w stiffer density EVA padding in the performance zones and medium density EVA padding in the fit zones. Thinsulate® Stretch – Developed by 3M, Thinsulate® is a lightweight synthetic insulation that delivers increased warmth in damp and cold conditions for all-day comfort and warmth. Thinsulate® Stretch offers enhanced elasticity, improving freedom of movement and foot support for better skiability. Shell Materials Cuff – Polyolefine Shell – Polyether Dual Core Technology – Harder durometer material is sandwiched between two layers of softer material for smooth flex and comfort. This technology reinforces the flexion and torsion of the lower boot structure to guarantee skiability while retaining unparalleled progressive flex. Generative Grid Design – Material thickness is reduced to save weight, while ensuring a sufficiently rigid structure for excellent skiability. This design has also allowed the length of the shell to be reduced by 3mm to create a more compact, slim and high-performance boot. Ski/Walk Mode Hike Mode 2.0 – Optimized hike mode includes a wider opening in the back of the lower shell, and a lower axis-of-rotation for optimized range-of-motion and uphill mobility (50? ROM). The articulating lower shell insert and metal-on-metal locking mechanism increase rearward support while supplying maximum power transmission on descents. Buckles 4 Micro-Adjust Aluminum Buckles Power Strap 40mm Velcro Strap Sole GripWalk Soles – If using an alpine binding, please make sure your binding is Gripwalk compatible - if in doubt, ask a certified technician. Dynafit Certified Tech Fittings Rubber Arch Pad Specs Ability Level:Advanced-ExpertMore Advanced-Expert