Icebreaker's 100% merino, 200gm Oasis Bodyfit™ tops layer effortlessly under any mid and outer layers for the ultimate cool weather adventures. With seams carefully offset from the peak of your shoulder, you won't find any irritation from the straps of a heavy pack. All over flatlock seams prevent chafing and underarm gussets allow breathability where your body needs it. The Oasis Long Sleeve Half Zip is your go-to adventure staple.