Icebreaker Mens 200 MerinoFine Ace LS Half ZipMerinoFine Fine 17. 5 micron icebreaker merino wool provides versatile comfort efficiently managing moisture drying quickly naturally resisting odours regulating temperature and maintaining breathability Half Zip designed for comfort in varying temperatures Shoulder and side seams set forward to help reduce friction Gusset for mobility and comfort Thumb slits to help keep your sleeves in place and for added coverage Flatlock seams to help reduce