Merino wool has quickly climbed to the top of the winter baselayer pecking order, due in part to the success of Outdoor Research’s Alpine Onset Half-Zip Top. This midweight baselayer traps heat, fights odors, and controls moisture while we farm pow in the backcountry or enjoy our local ski resort.
- Baselayer designed for cold days spent in the mountains
- Wool blend controls temperature, moisture, and odors
- Quarter-zip design layers well and adds climate control
- Thumbholes keep your sleeves where you want them
- Item #ODRZ8IZ


















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