Sierra Designs, Kelty and Ultimate Direction Sales Rep
The Solar Fusion has down where you need it: in the body and upper arms. We left it out where you don't need it: under the arms and in the hood. This makes it an active insulated shell without the bulk.
Of all of my SD outerwear, this is my favorite piece! It's super versatile; I can use it around the campfire during the summer or layer up under and use it on a hike in the winter. I always take it on trips as it packs small and doesn't wrinkle easy if gets smashed in the bottom of my bag. The fused seams give it a super clean look and helps shed water if it rains.