The North Face Summit Series Men's L6 Jacket is a down jacket for wrapping up in warmth in the alpine. The higher you go, the crazier the weather. The L6 is the 6th layer available in the series so you can make it to the top. Wear it on the belay or pile it on top of all your other layers, either way the 800 fill down will keep weight down and warmth way up. When it's not in use, it has the ability to compress down, so you can jam it into your pack. The exterior fabric has been engineered using FuseForm™ construction; combining plain weave nylon and ripstop nylon seamlessly for a higher durability. Snuggle in and stay toasty, even on the mountain.