Men's Fuse Long John | First Lite
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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

$85.00 USD $63.75 USD

Color/PatternBlack

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

Features

  • 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 46 reviews
93%
(43)
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(0)
0%
(0)
4%
(2)
2%
(1)
G
G.M.
Fit:
Product Size: M
Height: 5'10"
Weight: 190
Waist Size: 32
Inseam Length: 29
Location: Quebec/Canada
Primary Use: Moose/Whitetail/Late season
Better than Icebreaker

Was a big Icebreaker fan but the feeling of FL merino is way better.
Wore them with obsidian pants in Quebec freezing winter -20°C for a long walk and did not feel cold at any moments.

m
m.
Fit:
Product Size: L
Height: 66"
Weight: 200 lbs
Waist Size: 34
Inseam Length: 29
upgrade to base layer

I've been using my army issued polyester base layers for bow hunting until this year when I finally decided to upgrade my gear. I'm very happy with this investment. Not only is the quality of the materials top notch, the construction of the garment it self looks to be fairly durable. I hope to be able to use these base layers for years to come.

T
T.W.
Fit:
Product Size: XL
Height: 6'0
Weight: 230
Waist Size: 36
Inseam Length: 32
Draw Length: 28.5
Location: Western NY
Primary Use: Whitetail hunting; scouting; turkey hunting
Perfect base layer

This was my first foray into the world of First Lite gear, and it definitely won't be my last. I ordered the Fuse and Furnace sets, and both have been a welcome addition to my hunting gear. Fuse is a perfect base layer for anything 50 and below...and once it gets below 45 or so, I add on the Furnace as well. Perfect complement to each other, and don't feel bulky under the rest of my gear. I've been able to sit much more comfortably, and feel so much less bulky doing so. My next investment might have to be their gloves and socks, because my body now stays warm, it's the extremities that tend to feel the chill. Sizes tend to run true.

T
T.Q.
Fit:
Product Size: L
Height: 5-10
Weight: 175
Waist Size: 34
Inseam Length: 32
Location: New England
Primary Use: Upland game, watrerfowl, deer hunting.
Absolutely loving these

I am thoroughly impressed with this product. I've worn these from duck hunting sitting in cold New Hampshire blinds to beating feet for miles in Iowa after pheasant. They keep you warm but have excellent breath-ability to limit sweating. Unlike other base layers I've worn in the past, these don't stink after a day or two or three of wear. On me these seem to run a bit large but not excessively so. Will definitely be buying more FirstLite products for myself and encouraging others to look into them as well.

J
J.M.
Fit:
Product Size: L
Height: 5’11”
Weight: 205
Waist Size: 34
Inseam Length: 32
Draw Length: 28.5”
Location: Ohio
Primary Use: Hunting
Great base

Great product for early to mid October in Ohio. I used the Fuze top and bottom as a next to skin with the Obsidian pant and catalyst jacket worked well. My only suggestion is that if you are purchasing several different weights buy the sets in different colors or patterns so the set can be identified easily while getting dressed

J
J.A.
Fit:
Product Size: M
Height: 5’ 7”
Weight: 165
Waist Size: 30
Inseam Length: 32
Location: Texas
Primary Use: Day Hunting
Great but watch sizing

When I got these in they fit perfect and I wore them for a week in the Midwest and I loved them but the waste stretched out after I wore them and washed them now they’re about an inch too big in the waste so I’ll be ordering a size smaller next time.

G
G.J.
Fit:
Product Size: XL
Height: 6'2"
Weight: 225
Waist Size: 36
Inseam Length: 34
Draw Length: 29"
Location: Idaho Panhandle
Primary Use: Active Hunting

I bought the Fuse Crew and the Fuse Long John at the same time. This was my next to skin layer for the late October A tag Elk opening in the Idaho Panhandle. We had strange weather this year and a bitter cold front in the low teens to low twenties came in and hung around for the first half of the opening. Thank fully I received these a week in advance and was able to try them out with my other layers and decided to get the Uncompahgre Puffy jacket and pants to go with them for the morning and evening sits. This layer under the Sawtooth Jacket and Obsidian Merino Wool pants was perfect for hiking around the mountain sides in the mid twenty temps. I did not feel too cold or too hot in the mid day hikes an did not sweat out. The back half of the season's opening warmed up into the thirties and forties and these were perfect, and I found myself leaving other layers either at home or in my pack. I think these as a next to skin with the Obsidians and Sawtooth are great when you're moving in the mid twenties on up to the fifties or sixties, but for sits you will definitely want another layer. I ultimately ordered the Kiln quarter zip crew and zip off Long John's to add over these for November deer hunts. Fit was great! Great piece of clothing.

T
T.
Fit:
Product Size: M
Height: 5'7"
Weight: 155
Waist Size: 31
Inseam Length: 28
Location: Wyoming
Primary Use: Hunting, hiking, and fishing
Perfect for archery and early rifle season in Wyoming!

This base is perfect for cutting the early morning chill in September and early October in the Rockies.

D
D.W.
Fit:
Product Size: L
Height: 6'2
Weight: 210
Waist Size: 34
Inseam Length: 34
Draw Length: 30
Location: Pennsylvania
Primary Use: Hunting
Should Have Switched Long Ago

First Lite Merino base layers are superior to synthetic base layers. They wick better and keep you warm when damp, unlike synthetics that make me clammy.

Additionally my synthetics have a permanent funk that I can't get out no matter what I do. I plan on replacing all of my synthetic base layers with First Lite in the future.

T
T.M.
Fit:
Product Size: L
Height: 6'2"
Weight: 190
Waist Size: 34
Inseam Length: 34
Draw Length: 30
Location: Wisconsin, Maine & South Alabama
Primary Use: Base Layer for Early Season Tree Stand Hunting & Scouting
Works as Advertised

I previously only used poly pros issued by the military as my base layers but decided to try First Lite. I initially purchased the Fuse top & bottom as a next to skin base layer. The first time I used them temps ranged from 15-50 degrees. I wore underneath regular blue jeans and a hoody when scouting early season in Wisconsin & Maine and was generally comfortable. I actually forgot I even had them on most times because they're so comfortable. If paired with the right insulating layer and/or windstop jacket, you could treestand hunt. Might have to step up to the heavier base layer if expecting temps to reach single digits though. Actually looking at buying my dad a pair for general wear during Maine winters. They are so great at wicking I had no issues with sweating and getting cold. I also slept in these, as I typically only shower once or twice during my week long hunts in Wisconsin. These things 100% keep the stink off of you! Their merino wool is legit! Sizing feels great for me but guys with a shorter wingspan might feel as though the sleeves are a tad bit long. I also own competitor base layers and actually prefer those from First Lite. I plan to test out more pieces from First Lite and have pretty high expectations based on my initial experience with their base layers.