On fresh mornings when a tee won't cut it, the Sonic Hoody is the only layer you need. With a close-fitting wrap-style hood and excellent articulation, this lightweight, technical baselayer adapts to a range of activities where you need a little more protection but it's too warm for a midlayer. Breathable Motiv(TM) Aero fabric with bulk yarn technology responds to your output, effectively wicking away sweat and keeping you dry and comfortable on your fast hikes, mountain runs, and demanding ascents.