70 Flex Index: This boot has a flex rating of 70, which is best suited for beginner and intermediate skiers. Softer boots will be more comfortable, but won't offer enough stability at higher speeds. Stiffer than 70 will give that stability, but start to get a little less comfortable.
Wide Back Design: When the cuff buckle is released, the boot opens backward more than standard front entry boots. Its not quite like the rear entry boots of the 90's, but definitely easier to get into than most modern boots.
Flex Walking Sole: The forefoot of this boot can flex, right under the ball of the foot, to give greater comfort when walking in the boots. When the boot is stepped into a binding, the flex in the toe is eliminated.
W106 last: The forefoot width of this last is 106mm, which is an incredibly roomy and comfortable fit. A good choice for beginners and casual skiers, this one is extremely comfortable.
Micro-adjustable alloy buckles: These alloy buckles can be twisted to adjust for size, so if the default position of the buckle and the teeth is too wide or too narrow, you can twist the buckle like a screw until it fits just right.
Double Memory Buckle: One buckle does the work of two, via a cable system that goes over the top of the foot. The buckle does not get reset every time you release it, so it 'remembers' your last setting. Once you get the right fit dialed in, there's no need to remember where it was set, just close the buckle, and you're ready to roll.
Macro adjust ladder (SuperMacro): The tooth plate opposite the top buckles can be moved in or out for a huge range of adjustment, and to fit narrow to wide lower legs.
Soft Walk Heel: A rubber insert in the heel cushions while walking to get better grip and a more comfortable stride.
25mm strap: Velcro strap at the top of the boot that acts as an extra buckle, but without the hassle of a buckle. The strap holds the top of the boot together to provide a more even pressure across the front of the boot when flexing it.
Double Power Buckles: Some of the buckles on this boot (usually the top 2) have a metal flip-out that can be extended to give the skier more leverage when clamping it down.
Auto-Walk heel: A button in the back of this boot is engaged automatically by the heel piece of the ski binding, stiffening the boot and putting it in a 'ski stance.' When the boot is taken out of the binding, the button automatically pops back out relaxing the fit for easier walking.
Replaceable Toe and Heel Pads: This is a must-have for skiers that don't live in ski in/ski out condos. When your ski tech tells you that you have to buy new boots because the soles are worn down too much, just laugh at him and tell him to order you a new set of sole plates.
Grip System: Small rubber pads on the sole of the boot give better traction than a solid chunk of plastic, and also absorbs some of the shock while walking.