Backpack Straps: Carry the handle like a briefcase or open the straps and put your arms through them to wear it like a backpack for more convenience (you need a free hand to carry your boots your carry-on!)
Full Length Opening: A zipper that runs the entire length of the bag makes taking skis out and putting them back in very easy. Packing this bag to its maximum is also much easier, as you can see where to stash socks and clothing in the nooks and crannies.
Compression straps: The compression straps on both sides of this bag take up extra room so the gear in the bag doesn't slide around. They also make the bag smaller if a lighter load is being carried for the day.
Water Resistant Coating: The fabric has a coating on the inside of the bag to keep the snow and grime inside the bag instead of allover the back seat of the car. Be sure to air it out when you get home though!
Waterproof Lining: A coated nylon on the inside of the bag helps keep the melting snow and grime inside the bag instead of dirtying up the car or your nice clean ski jacket. This also helps keep the smell of stinky boots inside the bag. Just remember that you need to air out the boots at the end of the day, or else you'll end up with wet boots in the morning!
Drain Port: A small drain at the bottom of the bag allows moisture to escape from the bag.