L1 - Primus Long John - Beyond Clothing USA
L1 - Primus Long John - Beyond Clothing USA
L1 - Primus Long John - Beyond Clothing USA
L1 - Primus Long John - Beyond Clothing USA
L1 - Primus Long John - Beyond Clothing USA
L1 - Primus Long John - Beyond Clothing USA

Primus L1 Long John

$55.00

Available

Color
Black
Manatee Grey
Size
Fit: Standard
-
Size & Fit Guide
Length

This is a clearance item. All sales are final.

Availability:

Lightweight Next-to-Skin Performance

The Primus K1 Long John baselayer provides a powerful foundation for the rest of your system. A carefully balanced blend of wool and synthetic fibers ensures long-lasting durability, simple wash cycles, and fast, efficient moisture transport. Flat seams allow bulk-free layering, and a specialized fly delivers support and fuss-free access (even with gloves).

Fusion Wool

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.

Ballhalla™ Fly

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.

Performance Fit

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 BUILDER

SPECS

  • Layer Level
    1
  • Body Material
    2.7 oz. piqué 78% polyester/27% wool
  • Weight (Size L)
    7.1 oz.
  • Wind Resistant
    No
  • Breathable
    Yes
  • Moisture Wicking
    Yes
  • Fast Drying
    Yes
  • Pockets
    None
  • Source
    Imported

Trade Agreements Act Compliant
Designed in Seattle. Imported.

Customer Reviews

Based on 43 reviews
93%
(40)
7%
(3)
0%
(0)
0%
(0)
0%
(0)
K
Kyle R
Comfortable Underlayer for all around use

I have worn these twice so far- once under a pair of prana lightweight pants and once under jeans. Both times the Primus kept me nice and warm. I was not hot or feeling over-dressed. The fit was good. Ordered a size L, I usually wear a 34 x 32 jean and these were just a touch big and long. Nothing to complain about, just insight into sizing. These were as comfortable, if not more, compared to my REI brand 100% wool long johns. These Primus pants didn't seem as delicate as the wool pants- but only time will tell. The thicker waist band is appreciated.

T
Travis Sanders
Almost perfect

I was looking for something to warm me up on 34* mornings but not be too hot for the rest of the day. These work great! I’m 5’10 and 195 lbs, slightly dad bod and the mediums are a great fit. The only thing is the crotch is super long and somewhat baggy (make your jokes) which made the flap pretty sloppy and would open up on me. Otherwise, pretty good.

C
Cody Perkins
K1 long John

These base layers are exceptional, while staying active in temps below 40 degrees I was not cold at all

Just be aware they are very tight around calf’s and a little loose on waist for sizing

A
Allen Young
Great long johns

Love them plus the horizontal opening is a neat feature.

J
John Steil
I like them

I like them a lot. They feel like they pull a bit around the lower legs when I sit down, but I’m very un-used to wearing base layers. Overall they’ve performed well so far!

Need Help? Contact us with any size or fit questions. 206-767-0307

Primus L1 Long JohnSizing Information

Height 5' 8" - 6' 2"

Short: -2 Inches Inseam

Long: +2 Inches Inseam

SizeWaistHipInseam Regular
S30-3137-3829
M33-3440-4130
L36-3743-4431
XL39-4046-4732
2XL42-4349-5032
3XL45-4652-5332
4XL48-4955-5632
Body measurements in inches

Waist Preferred Pant Waist

Hip 7" Below Preferred Waist

Inseam Regular Crotch to floor

silhouette diagram

Fit Information

Standard True to Size | Active Layering

silhouette diagram
Product is Standard Fit, developed to accommodate up to two layers, for cross-environmental versatility

Expedition Oversized | Static Layering

silhouette diagram
Product is Expedition Fit, developed to accommodate up to four layers, for extensive use in extreme weather

Learn more about our layering systems

System Builder

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