Men's Furnace Long John – First Lite Performance Hunting
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Men's Furnace Long John
Men's Furnace Long John
Men's Furnace Long John
Men's Furnace Long John
Men's Furnace Long John
Men's Furnace Long John
Men's Furnace Long John
Men's Furnace Long John
Men's Furnace Long John
Men's Furnace Long John

Men's Furnace Long John

EXP 350 Merino-X

$110.00 USD

Color/PatternFirst Lite Cipher
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Whether you pulled a late-season elk hunt or are down to the closing bell in the treestand, First Lite's Furnace Long John is the perfect tool to help you punch that tag in cold weather. Using our Merino-X 350g EXP weight fabric, the Furnace Long John provides lofted insulation and protection from the coldest temperatures. Featuring flatlock seams, a brushed, jacquard waistband and an articulated fit, the Furnace Long John leverages the loft, structure and stretch of our Merino-X fabric to provide the ideal layering piece over our other lightweight, next-to-skin styles.This system is the new standard for stationary hunts or late season stalks when staying warm is critical to success.

Our Furnace EXP 350 Merino-X fabric incorporates a brushed (or fleeced) backside to our high loft, interlock knits to provide super-charged insulation without added weight. Adding this to the silent, odor-free benefits of merino wool, the Furnace merino is the hands-down choice for cold weather hunts.

The Furnace EXP 350 is also available in Henley and Quarter Zip Tops.

Product Videos

Men's Furnace Long John Details

Layering Position

  • Midlayer


  • True to size: Purchase your normal size to wear over or under other layers
  • 20.5 micron, superfine merino wool
  • 95% merino / 5% spandex
  • Expedition weight, fleeced Merino fabric for extreme cold
  • Full length
  • Jacquard waistband
  • Fully functional fly
  • Flatlock seams

How It's Built

  • Material: Merino-X
  • Cut: Athletic
  • Primary Uses:
    • Spot & Stalk
    • Tree Stand
    • Waterfowl
    • Upland
    • Fishing
  • Weight: 12oz.

Where to Use

  • Temperature Range:
    • Below 20F
    • 20F - 45F
    • 45F - 60F

Customer Reviews

Based on 29 reviews
Product Size: L
Height: 6’1”
Weight: 210
Fit Comments: The waist is a little loose but not bad with my thighs
Best long johns I d ever had

I wore these for about 5 days before I had to put them in the dryer to tighten them up. If I had some wool sweats I would have the ultimate bottom layers cough cough, hint hint.

Also when I was on a hunt I shared camp with a guy who was pretty high up at a company that rhymes with bore-tex and all of his base layers were First Lite. That’s says a lot about these products.

Product Size: XL
Height: 6'
Weight: 215
Location: Tree Stand/Western Hunting/Open water and hard water fishing
Primary Use: Hunt/Fish

If you need that layer of warmth, these are the ticket. When the temp dips down really low, I combine these with the fuse base layer.

Product Size: L
Height: 6’5”
Weight: 225
Fit Comments: Fit is great except waistband stretches out.
Location: Michigan
Primary Use: Treestand Hunting
Don’t buy!

Every product I’ve purchased from first lite has been top notch. In this case the furnace long john falls short due to a fatal flaw.. the waistband stretches out after only a couple uses, to the point where it bunches up around the waist and sags. It sucks when your $110 long johns won’t stay up on your waist. Otherwise they are very warm and comfortable.

Product Size: M
Height: 5’8
Weight: 170
Fit Comments: Fit decent. Lots of room. Maybe a touch big or maybe I’m just losing weight
Location: West, and Midwest.
Primary Use: Spot and stalk.
Very very warm!

These are very very warm! Fit is pretty good. If you have ever worn UA 4.0 these are like those on steroids. I have worn down into the 20’s with real feel and they keep me sweating on spot and stalk hunts. I highly recommend for cold weather.

Product Size: XL
Height: 6-1
Weight: 235
Fit Comments: As warm and comfortable as a hug from a large woman
Location: Southeast
Primary Use: Whitetail and waterfowl
Lookey here lookey here

These are the most comfortable thing I've ever put on. I'll pay whatever they want to put one or two pockets on these bad boys for me