The Tecnica Mach Sport 70 HV is a great option for the true beginner to mellow intermediate skier who has a mid-wide forefoot and medium to wide shaft of the leg. The 70 flex is very supportive for a newer skier, but not too stiff that learning and improving technique will be too difficult. The CAS (Custom Adaptive Shape) Polyolefine Shell can have small adjustments made to it by a bootfitter. The Comfort Liner is made with Celliant. Celliant is a heat reflective material that bounces body heat back towards the source to improve warmth on cold days on the mountain. Tecnica's LiftLock Buckles stay up and out of the way when opened up to make slipping on and off your boots very simple. A 35mm Velcro Strap helps cinch up the boot across your shins and gives you some rebound out of your turns.