Lightweight Next-to-Skin Performance
Build your day on a solid foundation with the K1 - Primus Long John baselayer. Merino wool with a synthetic coating delivers long-lasting durability, simple wash cycles, and the fast moisture transport your layering system needs. Flat seams ensure bulk-free layering, and a specialized fly closure provides support and fuss-free access (even with gloves).
Beyond Wool
Polyester fibers and a synthetic coating take our warm, moisture-wicking merino wool to the next level, increasing wool’s natural durability, preventing shrinking when washed, and speedily evaporating mopped-up sweat.
Package Deal
The Ballhalla™ fly keeps you comfortable all day long with anatomical support and minimal bulk, and the unique closure design ensures easy access even while wearing gloves.
Fuss-Free Foundation
Flat-seam construction ensures all-day comfort, delivering a smooth next-to-skin feel and reducing bulk when layering up.
K1 - PRIMUS
USE GUIDE
WHEN TO USE
Below 50°F as a next-to-skin baselayer.
PAIRS GREAT WITH
Active insulation and softshells.
BENEFIT OVER OTHER LAYERS
Highly breathable, fast-drying layer that can have any other layer worn over it.
Learn more about layering:
VIEW SYSTEM BUILDERSPECS
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Layer Level1
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Body Material2.7 oz. piqué polyester/merino wool
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Weight (Size L)7.1 oz.
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Wind ResistantNo
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BreathableYes
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Moisture WickingYes
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Fast DryingYes
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PocketsNone
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SourceImported
Trade Agreements Act Compliant
Designed in Seattle. Imported.