The La Bise Jacket offers incredible breathability in a light weight package that is wind resistant. Made for people who like to move swiftly in the mountains, the La Bise is so light that you won't even know it's on. Throw it in your pack and you won't even know its there. The articulated fit gives maximum flexibility with little to no excess fabric. It's the perfect jacket for single-track, trail runs, and summer hikes.