Lightweight Next-to-Skin Performance
Build your day on a solid foundation with the K1 - Primus Long John baselayer. Wool balanced with synthetic fibers 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 provides support and fuss-free access (even with gloves).
Our wool combines with synthetic fibers to create the ideal performance fusion for moisture management: wicking up and lifting out sweat, protecting against odors and wash shrinkage, increasing durability, and ensuring next-to-skin comfort. Your system’s moisture transport starts here.
The Ballhalla™ fly keeps you comfortable all day long with anatomical support and minimal bulk, and the unique design ensures easy access even while wearing gloves.
Flat-seam construction ensures all-day comfort, delivering a smooth next-to-skin feel and reducing bulk when layering up.
K1 - PRIMUS
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 BUILDER
Body Material2.7 oz. piqué 78% polyester/27% wool
Weight (Size L)7.1 oz.
Trade Agreements Act Compliant
Designed in Seattle. Imported.
Nice fit and keep me warm!
The LS shirt is bit too tight in medium size when usually medium would fit just right for me. Otherwise it’s very good and better for winter and fall.
Good fit, not really cold enough yet, but purchased as a spare, so like the first, will do it job.
Exactly what I needed out of a warm base layer. M its very close to the skin on a 5'10" 190lb "athletic" body.
I like the feel of the fabric along with the waist. I wish it was a little tighter around the calf’s but that maybe just my personal impression. I like the blend doesn’t get smelly even when wearing for days in a row.
Need Help? Contact us with any size or fit questions. 206-767-0307
K1 - Primus Long John
Height 5' 8" - 6' 2"
Short: -2 Inches Inseam
Long: +2 Inches Inseam
Waist Preferred Pant Waist
Hip 7" Below Preferred Waist
Inseam Regular Crotch to floor
Standard True to Size | Active Layering
Expedition Oversized | Static Layering