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.
Have now taken these on a couple camping trips in Colorado at around 9,000 feet and they are a perfect for a comfy camp layer. Have worn them under my hiking pants on colder nights and under shorts in the cool mornings while making coffee and breaking down camp. Plan to use them under snow pants on colder winter days for snowboarding and I’m sure they’ll be a perfect blend of warm and breathable. For the price, I’d buy these and other Beyond items over comparable Patagonia/North Face/Outdoor Research gear.
Great piece of kit.
I have purchased a couple of pair of these. Great fit at a good price. I wore them this past weekend on a camping trip, Friday night got pretty cold and these helped to keep me warm. Great quality as I have come to expect. I see these serving me well for years to come.
I wore the Primus K1 long John on a turkey hunt last week. Temperatures in the morning were in the 30s. Midday temperatures in the 60s.
This base layer kept me comfortable all day
Love this. I haven't had much time to use it (the time of year) but top notch construction that I know will last a long time.
Need Help? Contact us with any size or fit questions. 206-767-0307
Primus K1 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