Flex Rating: 8 out of 10
Flex Rating: The flex rating of a boot refers to how stiff the boot is, the higher the relative rating the stiffer the boot. Some boots will list 4 of 5, others may list 8 of 10; two such boots should have similar flex. In general more beginner rider wants a lower flex and more advanced rider a higher flex, but this is not always the case as some beginner riders like more support and some advanced riders like more give.
Removable Liner: This boot comes with a removable liner. Removable liners have the advantage of being easier to dry than non removable liners, and the disadvantage of usually being a little larger than a non removable linered boot of the same size.
Backstay: The back of this boot is reinforced for strength and stiffness. It gives you the support you need for any ability level.
Integrated Heel Counter: A fancy name for a piece of plastic in the heel that gives extra support.
High-Density Rubber Outsole: rubber liner of this boot is extremely durable and dense for digging into the snow without slipping.
Stash Pocket: An extra place to store a quarter for calling your mom to pick you up at the end of the day.
PVC/EVA shell/tongue materials: Scientific blend (PVC and EVA are both abbreviations of longer chemical names) offers more durability and comfort than other, uh, less scientific materials.
PVC Upper: The upper of this boot is a flexible PVC plastic, that feels about like a stiff leather. This material is highly waterproof and resists abuse well.
Comfort Form Removable Liner: This boot has a removable liner (for quick drying, cleaning, etc) with formable comfort foam to keep your feet warm and happy.
Speed Lace System: Two pulls on the laces, and cinch the lock into place, and you're ready to ride. Quick adjustment means more time on the slopes!