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


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:
    • Spot & Stalk
    • Tree Stand
    • Waterfowl
    • Upland
    • Fishing
  • Weight: 12oz.

Where to Use

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

Customer Reviews

Based on 24 reviews
Product Size: L
Height: 5'10"
Weight: 185
Location: MI
Primary Use: Treestand hunting
Warm and comfortable, but not durable

I was pretty excited to get this warm piece of Merino Wool. They fit great, are warm and breath well. Only disappointment was after 3 treestand bow hunts the stitching gave out on the back. I ended up sewing it, so it's fine now. However, I didn't expect something to rip as a base layer for this kind of $. Other than that great product and much better than other base layers.

Product Size: XL
Height: 6’2”
Weight: 280
Location: Tree stand
Primary Use: Warmth

Only base-layer you’ll need once the cold hits

Fit: 3
Product Size: M
Height: 5' 9"
Weight: 180lbs - 190lbs
Fit Comments: I have larger thighs in relation to my waste so most wool bottoms are tight in the legs and loose in the waste. These fit perfect. I don't get any bunch up under my pants. Also, many times underlays are tight on the leg openings which I find reduces good blood flow and can get uncomfortable after a long day. These fit very nice.
Well built, warm

Well made and very warm. Generally, I pull these out when it gets in the 20 or below. They can be too warm if you are active in 30 degrees, sitting they are nice however. Best wool that I have used.

Fit: 3
Product Size: XL
Height: 5' 11"
Weight: 210lbs - 220lbs
Location: New York
Primary Use: Tree Stand

Best base layer pants I've ever worn. All the guys I hunt with got a pair after I talked them up. Warm, Lightweight, no smell, and comfortable through all types of movement. From tree stand hunting to stalking.

Fit: 3
Product Size: S
Height: 5' 5"
Weight: 130lbs - 140lbs
Location: Maine
Primary Use: Fishing
Like ‘em

I hesitated to get smalls, but am glad I did. Mediums would have been too loose with my skinny legs & butt. Wore them under insulated pants in cold and wind, and under waxed cotton in cold and rain. They will also make good under-wader pants when the water is not too cold. They are warmer than another outfitter’s “expedition weight.” Very happy with purchase.If you made a heavier “Blast Furnace” I’d get them too.