Free Fly’s Flex fabric feels like it’s from the future—with a luxe, weighty drape, mind-blowing softness, and a laundry list of performance benefits like temperature regulation, UPF 50, and four-way stretch. A go-to for transitional seasons, the Bamboo Flex Quarter Zip is a layering MVP. Pair it with the All Day Legging and a favorite jacket for a crisp morning coffee run, or wear it as a solid base layer for hitting the slopes.