Icebreaker Women's Merino 200 Oasis Long Sleeve Crewe ladies Thermal TopIcebreaker Women's Merino 200 Oasis Long Sleeve Crewe Thermal Top. The Women's Merino 200 Oasis Long Sleeve Crewe Thermal Top by Icebreaker is flattering base layer top, which is great for people who feel the cold and need a warm casual top. It's also perfect as a mid weight base layer and its Bodyfit technology means it has a slightly more feminine cut and a bit more lycra in the fabric. Perfect to keep you warm, but still nice and breathable when