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

Men's Fuse Long John

Lightweight 200 Aerowool

$90.00 USD

Color/PatternFirst Lite Cipher

When temperatures begin to fall but breathability and dry times are still concerns, the Men's Fuse Long John is your go-to base layer. Featuring a comfortable, jacquard waistband and a fully articulated fit designed to leverage the structure and stretch of our Aerowool fabric, the Fuse Long John epitomizes versatility in the field.

Lightweight 200 Aerowool construction combines the finest, 17.5 micron merino wool available with 37.5-activated nylon fibers to create a super-charged fabric with incredible performance benefits. What you get is enhanced odor resistance, exponentially improved dry times, increased durability and moisture wicking, and a fabric that can cool you down when you're heating up and warm you up when it's cooling down.

The Fuse Lightweight 200 Aerowool is also available in a men's a men's crew, quarter zip and a Henley

Product Videos

Men's Fuse Long John Details

Layering Position

  • Next to Skin


  • True to size: Purchase your normal size to wear over or under other layers
  • 17.5 micron, ultrafine, merino wool
  • Lightweight 200gsm jersey knit fabric provides exceptional versatility
  • Exclusive 37.5 Active Particle Technology to exhaust moisture and maintain optimal core body temperature
  • Full length
  • Next-to-skin fit for maximum comfort and support
  • Jacquard waistband
  • Fully functional fly
  • Flatlock seams for next-to-skin comfort
  • Machine wash, line dry
  • Naturally UV absorbent to eliminate shine

How It's Built

  • Material: Aerowool
  • Cut: Athletic
  • Primary Uses:
    • Spot & Stalk
    • Tree Stand
    • Waterfowl
    • Upland
    • Fishing
  • Material Weight: 200 Lightweight
  • Weight: 6oz.

Where to Use

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

Customer Reviews

Based on 31 reviews
Product Size: XL
Height: 6'0
Weight: 230
Waist Size: 36
Draw Length: 29
Location: Back country
Primary Use: hunting & fishing
Good Product - Made in China

I like my Fuse Long John's like I do with my other First Lite gear. They perform well and serve their purpose, but is would be nice if they were not made in China.

Product Size: S
Height: 5'10"
Weight: 135
Waist Size: 29
Solid foundation

They fit great and are very soft with good stretch. It's amazing how fine the fibers are on these. Throw them on under your pants of choice and you won't regret it. They keep you comfortable in the early morning chill and aren't to hot when the temp rises throughout the day. So much warmer, cooler, stretchier, and breathable than Walmart and Academy base layers. If you can only afford 2 pieces of First Lite gear then get these and the top to start out.

Product Size: L
Height: 6’3’’
Weight: 180
Waist Size: 34
Draw Length: 34
Location: Hunting/fishing/work
Primary Use: Base layer in cold weather
Fuse long johns

I’ve been wearing these for over a year and they do not disappoint! Great in transitional weather. They keep down odor especially well on Multi-day backpack hunts. I would t wear any other pair out in the field.

Product Size: M
Height: 5'10
Weight: 170
Location: South
Primary Use: Hunting and around town when cold
Best Baselayer

Like all of my FirstLite gear, I wear these all the time!!

Product Size: M
Height: 5'9"
Weight: 170
Location: Montana
Primary Use: Duck hunting, backpacking, treestand hunting
Best Base Layers on the market

Excellent performance, both breathable yet warm, and super comfortable. I love the versatility of these as well, I've used them equally as base layers for backpacking trips, treestand hunting, and underneath my neoprene waders for duck hunting. Just buy them already!