The Burton Mob System Jacket is not a typical Burton Jacket because this is one of their only 3 in 1 jackets in their line. It’s well built and offers a decent variety of colors. The removable Taffeta liner is different as most have some sort of fleece but it still does a good job warming you up. It’s no puffy but it does offer more warmth when the temperatures drop. If you run warm then the shell might be used most of the time but if you are middle to running cold you might like the layer in for most days on the hill. The waterproofing treatment is new but based on our experience it’s an improvement and closer to an insert. If you put a lot of time on the mountain but don’t really push the limits in wet weather this is a great jacket.