Outdoor Research Alpine Onset Merino 150 1/4-Zip Top

What Our Gearhead® Experts Are Saying:

"This quarter-zip is the first thing I reach for when layering. The Merino-polyester blend regulates heat during high-output activities, and the flat seams make it comfortable enough to wear for days on the trail."

We rely on the Outdoor Research Alpine Onset Merino 150 1/4-Zip Top for all-day comfort during high-output pursuits and extended adventures. Crafted with a premium blend of Merino wool and recycled polyester, this base layer wicks moisture, regulates body temperature, and resists odor, making it ideal for multi-day trips. The lightweight fabric ensures we stay comfortable without overheating, while the 1/4-zip design allows quick ventilation when the pace picks up. Thoughtful details like flat-seam construction and a next-to-skin fit make this an essential piece for any layering system.

, Lightweight 1/4-zip base layer for cool-weather activities and layering, Merino wool regulates temperature and resists odors naturally, Recycled polyester enhances durability and quick-drying performance, Flat-seam construction prevents chafing for extended wear, Quarter-zip design offers quick ventilation during high-output activities, Ideal next-to-skin layer for multi-day and backcountry adventures