Lightweight Next-to-Skin Performance
Build your day on a solid foundation with the K1 - Primus Pullover baselayer. Wool balanced with synthetic fibers delivers long-lasting durability, easy wash cycles, and the fast moisture transport your layering system needs. Flat seams ensure bulk-free layering, and thumbhole cuffs combine with a ½-zip front to offer adjustable warmth.
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.
Flat-seam construction ensures all-day comfort, delivering a smooth next-to-skin feel and reducing bulk when layering up.
Thumbhole cuffs extend coverage for warmer hands, and a 1/2 zip front helps shed extra heat in a hurry.
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)8.5 oz.
Trade Agreements Act Compliant
Designed in Seattle. Imported.
Great base layer.
I used the K1 for some hikes and rucks out in the Cascades and it performed perfectly for the late summer weather. I initially got a Medium, but exchanged for a Large for a less snug fit. I appreciate the high collar which I don't see on too many technical shirts. Also, recommend stopping by the store if you're local to the area, some great people working there!
I use this pullover on cool morning runs. It’s lightweight and wicks sweat. Every piece of Beyond clothing Is top notch
I liked it so much - I purchased a second within 48 hours.
I purchased the K-1 Primus Pullover in November 2019 and have worn it biking through a Wisconsin winter. The pullover is well designed with long sleeves (great for biking), thumb holes, flat seams and a 1/2 zip front. One design feature that I do not find on other base layers is the high collar, which provides added warmth on very cold days. The fit is tight but this is not a casual shirt; the tight fit ensures proper moisture transfer and warmth.
Need Help? Contact us with any size or fit questions. 206-767-0307
K1 - Primus Pullover
Height 5' 8" - 6' 2"
Short: -2 Inches in Sleeve and Torso
Long: +2 Inches in Sleeve and Torso
Chest Widest part of chest
Sleeve Center back of neck to shoulder seam to sleeve hem edge
Standard True to Size | Active Layering
Expedition Oversized | Static Layering