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.
Awesome base layers - really work well with insulated pants. Not too thick, definitely breathable as well!
I work midnights in Upstate NY, and during the coldest nastiest nights these have kept me warm and comfortable. I never feel too hot or sweaty wearing them. The material and the fit is perfect for wearing under my work pants. They don’t get bunched up, or caught, or ride up like some others do. Great base layer!
I cannot truly imagine giving a less than 5 star review for anything from Beyond. These long Johns are, quite simply, the best.
I have purchased multiple long johns from Beyond, and these are by far the best. They are a perfect combination with the Rig Light pants for extra warmth. I expect the material blend to last a long time, longer than some other brands where I would wear holes in them pretty quick.
Had been looking at these for a while and took advantage of the holiday sale. Have already used them winter hiking in the PNW, snowmobiling and skiing as well as wearing out in the weather. They are a really great base layer, providing warmth while not making me feel too hot. A really nice lighter base layer that’s not itchy and you can wear all day.
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