Tongue Pull: A loop of fabric at the top of the tongue helps in putting on and removing the boots. Pull it forward and to the side and your foot should slide right in.
Permanent Liner: This boot comes with a NON removable liner. Non removable liners have the advantage of being smaller for the same size and the disadvantage of not being quite as easy to dry as removable liners.
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.
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.
Soft Touch Laces: Softer material used so your hands and fingers don't get torn up while tightening the laces.
Steel Hardware: The eyelets and other critical parts of the lacing system are made of steel for increased wear.