Men's Kiln Boot Top Bottom
Midweight 250 Merino-X

From September elk to January mallards, the Men's Kiln Boot Top is our do-it-all bottom. The 3/4 length successor to our best-selling Allegheny, this piece is constructed of Midweight 250 Merino-X fabric for improved structure and durability. Perhaps the most versatile baselayer component within the First Lite system, the Kiln Boot Top simply cannot be beat as a baselayer bottom for any outdoor enthusiast. This piece can be your first or second layer and will keep you comfortable and odor free from September through April. If you're looking for a true ace-of-spades in your layering system, look no further.


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 Men's Boxer Short, Quarter Zip Top, and Crew Top.


*More inventory expected in early summer.

$85.00
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Product Details

Layering Position

  • - Next to Skin
    • Features

      • - 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
      • - 3/4 length to fit just above boot top
      • - Jacquard waistband
      • - Fully functional fly
      • - Flatlock seams for next-to-skin comfort
      • - Machine wash, line dry
      Cut Athletic
      System Position Next to Skin
      Material Merino-X
      Product Weight 8 oz.
      Primary Usage Spot & Stalk, Tree Stand, Waterfowl, Upland, Fishing

Product Videos

Kiln Top
Merino-X Technology

Build your Kit

Reviews

4.8
of 5
21 Reviews
Fit
Runs Small
Perfect
Runs Large
Fit
Small
Perfect
Large
My go to mid/late season base 3/12/2019

The kiln boot top bottom became my go to base for mid/late season hunting in the rockies of CO. I love the warmth and the feel of the material, and the fact that it holds shape so much better without bagging after days in the backcountry makes it so much more of a go to than my older versions. I still like my Glenbrook, but these are much more suitable in the later seasons.

Nickname: Conrad T.
Height: 5'2" - 5'4"
Weight: 140lbs - 150lbs
Size: S
Location: Colorado
Use: Spot & Stalk
Fit
Small
Perfect
Large
Disappointed 3/5/2019

I have long been a big first lite fan and own several of their base layer sets. But I have been very disappointed with these bottoms. They are very loose fitting through out and don’t hold their elactisity at the leg openings. I’m 5’9”, 190 lbs with pretty thick muscular legs. I ordered a Medium and they are still very loose and the bottoms end up bunching up underneath my knees after a very short time. I will say that the material is soft and comfortable and the pants are warm. I just wish they had more of an athletic fit instead of being more like comfy loose fitting Capri pants. I will be going back to full length base layers pants next time. Unfortunately, First Lite doesn’t offer these in full length, not sure why.


How it fits
Loose fitting and baggy through the seat and thighs
Leg openings don’t hold elactisity and end up bunching up Just below the knees

Nickname: AndyC
Height: 5'8" - 5'10"
Weight: 190lbs - 200lbs
Size: M
Location: Oklahoma
Use: Tree Stand
Fit
Small
Perfect
Large
Better 2/24/2019

I owned the Allegheny suit, then sold it and bought this when FirstLite came out with the new version. The design change did what it was intended to do, added structure to the garment for a better fit. The old version would sag a little especially after wearing a while and become a little unstructured. The merino X version is great, warm, soft and itch free. And I really like the chest pocket. Perfect weight for November rut hunting in the Midwest.

Nickname: BW
Height: 5'10" - 6'
Weight: 250lbs - 260lbs
Size: XXL
Location: Kentucky
Use: Tree Stand
Fit
Small
Perfect
Large
Incredibly Layering Option for Southern Hunters 12/16/2018

I hunt in the deep south, and temperature fluctuations are a serious issue. It is not unusual to hunt one afternoon in 70 degree weather, and wake up the next morning to find its 29 degrees and windy. Having been convinced to go the wool route by my uncle who hunts out west, I purchased these pants for those chillier days, especially when there is a good wind. I have hunted with these, and my Obsidian pants on several very cold mornings (25-30 degree days) and I have found them to be a tremendous combination. The Obsidian pants alone are comfortable in lower temps, and while these are not wind proof, they are so warm when combined with the pants, I find they are perfectly suitable for that temperature range. I would highly suggest these to anyone who hunts public land in the deep south as a light and packable option to slip on having walked to the stand!


How it fits
Wonderful fit.

Nickname: Walter
Height: 5'6" - 5'8"
Weight: 200lbs - 210lbs
Size: L
Location: Florida
Use: Tree Stand
Fit
Small
Perfect
Large
Great warm bottoms 12/6/2018

Pants are very soft and warm. I love the length of the pants a lot better than standard thermals.

Nickname: Chad
Fit
Small
Perfect
Large
Perfection as a layering piece for a whitetail stand hunter 11/26/2018

The boot cut eliminated the hot, sweaty uncomfortable bunching you get around your heavy winter boots and socks. I think this makes my feet warmer, especially when I have a hike into the stand. When it gets really cold (below 20 degrees with significant wind), I will add an additional fleece layer between this and my Sanctuary bibs.

What I like most is the sheer comfort and excellent fit of this piece. It fits snugly but doesn't constrict in the slightest. It feels like I'm wearing nothing at all.


How it fits
Fits me perfectly as a taller guy with an athletic build but a few extra pounds here and there.

Nickname: Andy M
Height: 6'4" - 6'6"
Weight: 220lbs - 230lbs
Size: XL
Location: Iowa
Use: Tree Stand
Fit
Small
Perfect
Large
Love my First Lite gear but the fit was a letdown ... 11/8/2018

Don't get me wrong - this is another great piece of gear from First Lite. Unfortunately I removed the tags and had to roll with it even though the fit is way off.

I ordered and XL. (I order all of my clothes in XL.) My Charma shirt and Allegheny bottoms are both XL and fit great. The Kiln bottoms in XL seem ENORMOUS! I damn-sure haven't lost any weight! Droopy-drawers to the point of having me wondering if they were XXL or larger.

Big disappointment that I can't return at this point. I'll make due with a bit of extra base layering and a good belt!


How it fits
Fit seemed WAY off for XL. Billowing-sail-enormous!

Nickname: TC
Height: 5'10" - 6'
Weight: 230lbs - 240lbs
Size: XL
Location: Virginia
Use: Tree Stand
Fit
Small
Perfect
Large
Great product! 10/31/2018

Fits perfectly, not too tight and not too loose. It keeps me warm and it feels like the sweat almost evaporates when you walk in. I will no longer buy UA products or anything similar. First lite has earned my business for life. Would recommend this product to anyone.


How it fits
Fits me perfectly. Not too tight and not too loose.

Nickname: Jordan1025
Height: 5'10" - 6'
Weight: 190lbs - 200lbs
Size: L
Location: Tennessee
Use: Tree Stand
Fit
Small
Perfect
Large
Awesome 9/20/2018

The boot top cutoff is money as I do not like my underlayer also going into my boot.


How it fits
Little baggy wish I ordered a size smaller

Nickname: Chad
Height: 5'10" - 6'
Weight: 190lbs - 200lbs
Size: L
Location: Alaska
Use: Spot & Stalk
Fit
Small
Perfect
Large
Go to bottom layer 9/10/2018

This is the best bottom layer and will cover you from those first cool mornings to later season mornings under a heavier pant. Pair these with a longer sock like the Mountain Athlete Compression Sock for a great base layer combo.

Nickname: Parker
Height: 5'10" - 6'
Weight: 170lbs - 180lbs
Size: L
Location: Colorado
Use: Spot & Stalk
Fit
Small
Perfect
Large
Great early season layer 9/6/2018

Needed something a little lighter to pair w/ my guide pants. Great for active hunting on cold days where maintaining an even temperature is key. Tall socks up to the top keep ya' warm when you need it.

Nickname: Nick
Height: 5'10" - 6'
Weight: 160lbs - 170lbs
Size: M
Location: Michigan
Use: Spot & Stalk
Fit
Small
Perfect
Large
Great for muck style boots 8/31/2018

These are great for guys who wear rubber boots or tall socks. They feel great and look forward to wearing these in the stand and also under waders in the swamp!

Nickname: Sycamore
Size: L
Fit
Small
Perfect
Large
Regulate temperature and super soft 8/30/2018

These are my favorite pair of “long john’s”. I typically don’t wear base layer bottoms until late season because I get too hot. The 3/4 length is great cause it’s gives warmth where needed, it pairs well with the long Firstlite socks, and you don’t have to try and tuck them into boots if you wear 8” or higher boots. Softest merino I’ve felt with great wicking, and temperature regulation.


How it fits
Fit is great. Not a compression fit but they fit snug. You barely notice they are on because they just barely touch your skin.

Nickname: Tyler
Height: 6' - 6'2"
Weight: 150lbs - 160lbs
Size: M
Location: Washington
Use: Spot & Stalk
Fit
Small
Perfect
Large
Delivers as Advertised 8/30/2018

Very happy with the material and fit of the Kiln Boot Top Bottom. Have used it on some high elevation (colder temps) hikes and climbs in the Alps. Will bring it to Colorado in Sep for an archery elk hunt. Also plan to use it this winter and spring for skiing. The Kiln Boot Top Bottom should allow me to have a good fit with my ski boots and my thick socks, without having to worry about crowding from a typical thermal bottom.

Nickname: ARK
Height: 5'10" - 6'
Weight: 190lbs - 200lbs
Size: L
Location: Europe
Use: Lifestyle
Fit
Small
Perfect
Large
Yet another great piece. 8/29/2018

I am so glad I picked these up. They are going to be part of my layering system on a post-rut 2nd rifle Colorado bull elk hunt. I expect the cold won't be a factor. Shipping time was super fast as always, even during a major sale. Excellence all around, as per the usual FirstLite custom.

Nickname: Levi
Height: 5'6" - 5'8"
Weight: 170lbs - 180lbs
Size: L
Location: Colorado
Use: Spot & Stalk
Fit
Small
Perfect
Large
Really excited about these 8/29/2018

I replaced my old base layer with these this year and I'm very excited about them. They fit great and are very comfortable. Can't wait to get them out in the field this fall.

Nickname: Cody
Height: 5'10" - 6'
Weight: 170lbs - 180lbs
Size: M
Location: Colorado
Use: Spot & Stalk
Fit
Small
Perfect
Large
Just what I wanted! 8/29/2018

I cannot wait to wear these bottoms this fall. Fits great and ought to keep me plenty warm during hunting season.

Nickname: Cole
Height: 5'10" - 6'
Weight: 160lbs - 170lbs
Size: M
Location: Texas
Use: Tree Stand
Fit
Small
Perfect
Large
The Boot Top is where it's at! 8/29/2018

the Boot top cut is the greatest invention to base layer bottoms ever! It allows me to maximise my warmth on the legs without creating that extra heat in the tops of my boots. especially nice when hunting in cold weather on the move.

Nickname: Eric
Height: 5'10" - 6'
Weight: 190lbs - 200lbs
Size: L
Location: West Virginia
Use: Spot & Stalk
Fit
Small
Perfect
Large
Do all bottom piece 8/28/2018

This is my favorite base for the bottom, no rubbing ur socks into your calf or lines from your boots pushing them into your leg. And a nice piece to wear to bed

Nickname: Austin
Height: 6'2" - 6'4"
Weight: 200lbs - 210lbs
Size: L
Location: Colorado
Use: Spot & Stalk
Fit
Small
Perfect
Large
Great fit. Great quality. Nothing but the best. 8/1/2018

Never have been a merino guy but these things are awesome. Great for mid to late season. Sizing is perfect from the sizing chart. Put together really well.


How it fits
I’m athletic and muscular. I wear a 34 in all pants and the large fits perfect.

Nickname: Travis
Height: 6' - 6'2"
Weight: 200lbs - 210lbs
Size: L
Location: Indiana
Use: Tree Stand
Fit
Small
Perfect
Large
Great fit and Material 7/31/2018

Really loving the new Merino-X. It's really comfortable and flexible, but has a lot of rebound. I'm assuming it'll be at least as effective as a base layer as the old wool was and really looking forward to putting it to work in the stand and the fields this season.

Nickname: Scott
Height: 5'10" - 6'
Weight: 170lbs - 180lbs
Size: M
Location: Pennsylvania
Use: Tree Stand