Based on your IP Location or Currency Selection you are now shopping in United States Dollars United States Dollar. If you need to change your currency please make a selection in the selector below.
Shopping Cart
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John
Men's Kiln Long John

Men's Kiln Long John

Midweight 250 Merino-X


In Stock & Ready to Ship

When the forecast calls for persistent cold temperatures and your hunt demands varying levels of activity, the Kiln 250 Long John is there for the long haul. Lofted 250gsm Midweight Merino-X provides sustained but balanced warmth all day, no matter if you're stationary or climbing mountains. The 17.5 micron merino wool remains soft and comfortable next to skin while ventilating, fighting back odor, and staying silent. If there is one piece you should have for mid and late-season hunts, it's the Kiln 250 Long Johns.

Men's Kiln Long John Details

Layering Position

  • Next to Skin


  • Kiln 250 gsm Merino-X construction
  • 17.5 micron, ultrafine merino wool
  • Warm lofted interlock knit 
  • Jacquard waist band and functional fly
  • Odor resistant and silent
  • Next-to-skin fit and flatlock seams for maximum comfort and support
  • Exclusive 37.5 Active Particle Technology that exhausts moisture and helps maintain optimal core body temperature
  • True to Size: purchase your normal size to wear over or under other layers
  • Machine wash, line dry

How It's Built

  • Material: Merino-X
  • Primary Uses:
    • Spot & Stalk
    • Tree Stand
    • Turkey
    • Waterfowl
    • Upland
    • Fishing
  • Material Weight: 250 Midweight

Where to Use

  • Regions:
    • Intermountain/Rockies
    • Southwest
    • Midwest
    • Northeast
    • BC/Alaska
    • Pacific Northwest
    • Southeast
  • Temperature Ranges:
    • 20F - 45F
    • 45F - 60F

Customer Reviews

Based on 133 reviews
Andy Battellino
Product Size: L
Height: 6'1
Weight: 210
Waist Size: 34
Inseam Length: 32
Location: Pgh, PA
Primary Use: Hunting, Fishing, Skiing
Superior Performance Base Layer

I'm a first-timer to merino base layers. After reading about merino, I wanted the additional strength the 5% spandex adds, plus all the warmth, wicking, and comfort high-quality merino supposedly provides. The Kiln 1/4 zip top & bottoms noticeably outperform my UA pieces and any pieces I've ever worn hunting, fishing & skiing in PA. I am glad I found First Lite on an online "Best Base Layers" review. Totally worth the investment.

Trevor Totton
Product Size: XL
Height: 6’2”
Weight: 270
Waist Size: 40
Inseam Length: 32
Location: In the woods
Primary Use: Whitetail hunting in Michigan & Missouri
Worth EVERY penny!

For the longest time I thought there was no way long johns for $100+ would really be that much different than your $20-$40 basic long johns. Boy was I wrong. These are worth every penny and exceed all expectations. Comfortable, warm, perfect amount of stretch. Merino wool is an incredible material and I’m officially hooked.

Product Size: M
Height: 5’10
Weight: 170
Waist Size: 32
Inseam Length: 30
Location: My legs
Primary Use: Underwear
Kiln Long Jimmy Johns

All of First Lite’s products are top of the line and well worth the price point they’re listed at.. Their Kiln line of merino wool is probably my favorite, it’s super comfortable and works great.. If you’re not wearing First Lite as your base layers then it’s time to grow up and get yourself some..

Donald Stoulil
Product Size: XL
Height: 6’
Weight: 215
Waist Size: XL
Inseam Length: 30’
Location: Outdoor fishing etc
Very comfortable

Long Johns are very comfortable and definitely kept me warm while fishing.
I even wore them as pajamas.

Dana Amidon
Product Size: 34 x 32
Height: 6’
Weight: 175
Waist Size: 34
Inseam Length: 32
Location: Hunting, skiing
Best base layer I own

Awesome base layer! I’m using them for work and play. Super comfortable and warm if active in sun zero temps. Maybe a tad to baggy for fitting under work pants, but for all my other pursuits (hunting, fishing, skiing) they’re perfect! Like all my other first lite gear they’re very well made and comfortable. Can’t ask for more!

Grant Bryans
Product Size: L
Height: 5'9"
Weight: 200
Waist Size: 36
Inseam Length: 30

Most comfortable base layers I have ever worn.

Product Size: L
Height: 5'10"
Weight: 185
Waist Size: 34
Inseam Length: 32
Location: Pennsylvania
Primary Use: Hunting / Hiking / Snowmobiling / Skiing

I have both the kiln long john and hoody, they are by far the most comfortable articles of clothing I own.

Dianne Martin
Product Size: S
Height: 5' 7"
Weight: 115
Waist Size: 28
Inseam Length: Not sure
Location: Wyoming
Primary Use: Big game hunting
Kiln long john pants

Very nice long john. I own two pair. Would definitely recommend.

Product Size: L
Height: 6'
Weight: 190
Waist Size: 34
Inseam Length: 33
Location: Outdoors
Primary Use: Anything cold.
Warmest base layer bottoms I now own

Will now be my go to set for sub freezing temps. I haven’t had these in the woods yet, but have worn a few times in single digit temps under ski pants or light pants, and they work great. Better than any other set I own.

Product Size: XL
Height: 6'4"
Weight: 245
Waist Size: 36
Inseam Length: 36
Draw Length: 31.5
Location: Texas, Utah, CO & WY
Primary Use: Late season hunting

I called customer service to get feedback on sizing, and ended up going with an XL. I have large thighs and wanted to make sure I had plenty of room in that area. I definitely should have gone with a large. The XLs fit ok, but a large would have been better. I'm 6'4" and these are a little long on me, and there's a bit of loose fabric around the thighs and legs. I would suggest to just follow the size chart and you should be ok.