Men's Kiln Long Boxer Brief | First Lite
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Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief
Men's Kiln Long Boxer Brief

Men's Kiln Long Boxer Brief

Midweight 250 Merino-X

$50.00 USD


From September elk to January mallards, the Men's Kiln Long Boxer Brief is the perfect solution for cooler weather. The 10" inseam and articulated construction are familiar to those who know our Red Desert of years past. Constructed of Midweight 250 Merino-X fabric, this interlock knit is being used in our boxer category for the first time to add super comfortable insulation in cooler weather.

The Kiln Midweight 250 Merino-X fabric utilizes ultrafine, 18.5 micron merino wool in a high loft, interlock knit to create styles that surpass expectations in the broadest range of temperature and weather conditions. Blending a small component of spandex into this knit, these lofted interlock pieces can withstand extended hunts in the field, regardless of the season.

The Kiln midweight 250 Merino-X is also available in a men's Boot Top Bottom.

Product Videos

Men's Kiln Long Boxer Brief Details

Layering Position

  • Next to Skin


  • True to size: Purchase your normal size to wear over or under other layers
  • 18.5 micron, superfine merino wool
  • 95% merino / 5% spandex
  • Interlock knit for high loft insulation and moisture management
  • Jacquard waistband
  • Fully functional fly
  • Flatlock seams for next-to-skin comfort
  • Machine wash, line dry

How It's Built

  • Material: Merino-X
  • Cut: Athletic
  • Primary Uses:
    • Spot & Stalk
    • Tree Stand
    • Waterfowl
    • Upland
    • Fishing
  • Material Weight: 250 Midweight
  • Weight: 6oz.

Where to Use

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

Customer Reviews

Based on 27 reviews
Tanner Shuler
Product Size: M
Height: 5' 7"
Weight: 160
Waist Size: 32
Inseam Length: 31
Location: WY
Primary Use: Hunting/Hiking
Great Piece

These are great! Perfect for multiday hunts or hiking trips. I have a 32" waist and could probably have used a small.

Product Size: L
Height: 5’9”
Weight: 185
Waist Size: 34
Inseam Length: 30
Draw Length: 28
Location: Hunting - so far!
Primary Use: Hunting
Like a body warmer! Outstanding!

This base layer is incredible! Wear it as base or second layer. Love it. Just can’t wear it on the way to the stand or I will overheat. It is so warm and comfortable! Absolutely the best heavyweight base I’ve ever worn!

Product Size: L
Height: 5' 7"
Weight: 205
Waist Size: 36
Inseam Length: 29
Location: Hunting & motorcycling
Primary Use: Motorcycling
Kiln Long Boxer Brief

I bought these for a hunting trip starting this weekend with a lot of horseback riding. I thought these would be great in the saddle. It turns out they are also great for long motorcycle rides. I wore them last weekend and they proved invaluable on the cold ride home. They are very comfortable and helped keep me warm on the ride home. Great boxers.

Josh Evers
Product Size: M
Height: 5/10
Weight: 195
Waist Size: 34
Inseam Length: 30
Location: Everywhere
Primary Use: Hunting, Fishing, Anything outdoors
Game Changer! Best Piece Ever

Absolutely love these merino boxers. They keep me comfortable all season long, and I don't have to worry about pinch, sweat or stink. I will say they run a bit on the large side, as I am 5'10 195lbs and the medium fits me perfectly. These things will be my GO TO for hunting, fishing or any time I need comfortable base layers in chilly/cold conditions. Leave your cotton boxers at home and get yourself a pair (or two) of these!

Product Size: S
Height: 5’9”
Weight: 170
Waist Size: 30-31

This review is to help out with fitting. I generally wear small underwear and ordered a small. My waist is a 30 or 31 depending on brand in jeans. I’m glad I did not order up in the medium. The small fits good but a medium would have definitely been too large.

Product Size: L
Height: 6'4
Weight: 240
Location: Missouri and Tennessee mountains
Great base layer

I will be ordering another pair of these and the lighter weight ones for spring and fall in Missouri. I wore these on a weekend whitetail hunt and then again in the Smoky Mountains hiking in and out for a total of 10 miles. They were great formal weather under 50, but started to get a bit warm when the temps hit above that point. That being said they were still comfortable and I didnt get swamp ass from them either.

Product Size: M
Height: 6'
Weight: 165
Location: Cold weather whitetail hunts in Wisconsin
Primary Use: Baselayer
Comfortable and warm

Purchased these with several other pieces of First Lite gear a few weeks ago. I've already had them out on several cold weather hunts here in Wisconsin and am pleasantly surprised with how nice they work. They are my first pair of wool boxer briefs, and I am very happy with how they have performed so far. As with some of the other pieces, I feel like they run just a little bigger than a normal medium (will probably order these in a small if I order another pair), but that could be me being a pretty thin guy. The quality of them is second to none, and I can honestly recommend them if you haven't ever had a piece like this in your gear list.

Product Size: L
Height: 6'2"
Weight: 225
Location: Colorado Rockies
Primary Use: Hunting
second insulating layer

Purchased these, along with the Zero Cold Weather OTC socks, for a recent Colorado elk hunt. While it was a warm season these basically doubled as a second insulating layer, and some days I did not even start the morning out with long johns. I will definitely be ordering some more, and wearing them on colder winter days around town as well. One point to note is they seem to run large compared to most other brands.

Product Size: L
Height: 5'10
Weight: 230

I took 2 pair with me for an 8 day hunt. These exceeded my expectations! They were warm when they needed to be and kept me cool when the temps got up. Never once did I have any problems with chaffing. Temps were between 25-70 degrees. Also helped with keeping odor to an absolute minimum.

Product Size: L
Height: 6'1"
Weight: 210
Location: Colorado Rocky Mountains
Primary Use: Elk
Great Product

I bought a couple pairs for a western elk hunt. I figured I spend a little extra money on boxers since I'd be wearing them 3-4 days at a time. The temperatures ranged from the High 20's all the way up to a couple days that reached the high 70's and I was comfortable at all temperatures with minimal odor. Really happy with this product and happy I spent the extra money on a quality pair of boxers.