Combining%20the%20naturally%20anti-odor%20properties%20of%20merino%20wool%2C%20and%20the%20added%20durability%20of%20recycled%20polyester%2C%20the%20lightweight%20Alpine%20Onset%20Merino%20150%20wool%20base%20layers%20are%20an%20easy%20choice%20for%20winter%20layering%20without%20overheating.%20Ideally%20worn%20directly%20next%20to%20the%20skin%2C%20and%20built%20with%20a%20no-chafe%20flat%20seam%20construction%2C%20the%20naturally%20anti-odor%20properties%20of%20these%20layers%20make%20them%20an%20excellent%20choice%20for%20multi-day%20trips%2C%20extended%20backcountry%20adventures%2C%20and%20activities%20where%20layering%20up%20without%20overheating%20is%20paramount.%20An%20essential%20collection%2C%20the%20Alpine%20Onset%20Merino%20150%20base%20layers%20are%20the%20foundation%20upon%20which%20great%20performing%20outerwear%20kits%20are%20built.