Icebreaker 200 Oasis S/S Crewe Merino base layer (XL, grey/black) - The Icebreaker 200 Oasis SS Crewe functional shirt is a great option for travel, everyday life and virtually any outdoor activity. The shirt is made of high-quality merino wool, which is naturally odour resistant and temperature and moisture regulating. In other words, you won't have to wash it as often, making it a great option for longer adventures. If it doesn't smell, nobody can tell! The flatlock seams prevent any unpleasant chafing, and the offset shoulder seams make wearing a backpack nice and comfortable. The underarm gussets allow for plenty of freedom of movement, keeping you comfortable at all times. A great option for several occasions - the Icebreaker 200 Oasis SS Crewe functional shirt.