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
Men's Furnace Long John

Men's Furnace Long John

EXP 350 Merino-X

$110.00 USD

Color/PatternFirst Lite Cipher

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:
    • Tree Stand
    • Waterfowl
    • Upland
    • Fishing
  • Weight: 12oz.

Where to Use

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

Customer Reviews

Based on 37 reviews
Product Size: XL
Height: 5’9
Weight: 250
Location: Midwest
Primary Use: Whitetail/stand hunting
Great Layer

Extremely warm layer, but also will keep you comfortable if you are doing more than stationary hunting. As someone that runs hot, this is important. Would be a great addition to any hunting clothing system!

Product Size: XL
Height: 6’2”
Weight: 220
Fit Comments: Fits perfect without any binding.
Location: Cold/wet hunts
Outstanding warmth

I paired these with the furnace Henley and is amazing warmth and comfort for cold hunts.

Product Size: L
Height: 5’9”
Weight: 160
Primary Use: Tree stand and short hikes.
First Lite review catalyst pant, jacket.

The catalyst pants and jacket are great. They fit well and are the most comfortable pants and jacket combo I’ve ever worn. I’m 5’9” and the sleeves were a bit long but they fit snug and that makes them the perfect length to mate up with gloves without leaving a gap. They don’t seem well suited for sitting if the wind is blowing. They breath well and I can’t wait to wear them while moving. The furnace long johns and pullover are the perfect weight and also offer great breathing quality. My next purchase will be the sanctuary bibs and jacket. My friend swears by his. I intend to have a complete first lite kit at my disposal for whatever conditions arise.

Product Size: L
Height: 6' 2"
Weight: 190
Excellent Product

I've used these in both active and stationary activities in 20deg weather and my legs were always comfortable. Not too hot and not too cold, just the perfect temperature for whatever I'm doing.

Product Size: M
Height: 6’
Weight: 190
Location: Tree stand hunting/waterfowl wetlands
Primary Use: Next to skin base layer
Great quality great warmth

These long johns fit great, feel great, and are extremely warm. I wouldn’t hesitate wearing these in to the woods in any temps with just a wind stopper pant. These were part of my first First Lite order and I am impressed.