No matter what we are getting up to this winter, the Icebreaker Merino 200 Oasis Long-Sleeve 1/2-Zip Top has us covered. Featuring a 100% Merino wool construction, the Merino 200 Oasis Long-Sleeve is perfect for wearing as a baselayer for hiking, snow sports, or casual use. The quarter zip allows us to customize our airflow and warmth, while the slim fit ensures it is easy to layer with.