If you need a go to layer for highly aerobic spring activities look no further than the north faces aptly named nimble hoodie breathable and stretchy youll move in complete freedom and never fall foul of overheating no matter how intense things get special windwalltrade fabric blocks out wind chill to keep you warm too which is great when youre up at altitude for added protection you can throw over the cosy hood as well as tighten the cuffs and hem for a snug fit all day long