The Tecnica Mach1 130 HV offers an accommodating fit with enough power for bigger guys who have a medium to wide forefoot and medium to wide calf volume or a more aggressive, strong skier. The C.A.S. (Custom Adaptive Shape) Shell is easily customizable for a bootfitter to shape the shell. Dimples hold a punch much easier and more accurately than any other shell ever constructed. The C.A.S. Celliant Liner has customization in the heel and ankle pocket that can be heated, molded, shaped and grinded for a performance oriented fit, with a strong heel hold and energy transmission. A 45mm Power Strap keeps a secure fit across your shin, while adding rebound to each turn. Tecnica's Quick Instep Technology has a softer injection of plastic across the top of the foot that allows your foot to slide into and out of the shell effortlessly. Complete with 4 Lift Lock Buckles that are highly durable, adjustable and are able to stay buckled all day when you are getting after it on the mountain. C.A.S. - Custom Adaptive Shape P.U. Shell, Quick Instep, Polyester Overinjected Backspine Cuff, High-Performance C.A.S. Celliant Liner and Instep, Asymmetrical Power Transmission, Double Canting and Velcro Spoiler, 45mm Full Contact Strap, 4 Lift Lock Adjustable Buckles, Best Fits a Medium to Wide Forefoot and Medium to Wide Shaft of the Leg, Actual Flex: 130, Cuff Alignment: Dual, Warranty: One Year, Ski Boot Width: Medium Wide (102-103mm), Flex: Very Stiff, Forefoot Width: 103mm, Buckle Count: 4, Category: Downhill, Ski Gear Intended Use: All Mountain, Instep Height: High, Calf Volume: Medium, Skill Range: Advanced - Pro, Model Year: 2020, Product ID: 573232, Model Number: 10186000 265, GTIN: 0888341688534