The Icebreaker 200 Oasis Long Sleeve Half Zip Top is the Merino marvel you need to dial your kit to perfection.100% Merino Wool Bodyfit fabric provides unrivaled next-to-skin comfort with offset shoulder seams to prevent pack rub and flatlock construction to eliminate chafing. Whether popping pillows on the mountain or pillow fighting in the hotel, the Icebreaker 200 Oasis Long Sleeve Half Zip Top is mountain comfort made easy.