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The Newsletter.

Learn about product availability and see behind-the-scenes action, from cleaning raw sheep's wool to pressing pure copper rivets. This newsletter has it all!

– Michael, writer of the newsletter.

The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth
The Undyed Mammoth

The IS Experimental and Extraordinary Division

The Undyed Mammoth

Regular price $675.00

Size

THE MAMMOTH SIZE GUIDE

  • We recommend you grab your favorite fitting jacket and compare measurements to find your best fit.
  • Generally, we'd suggest you size up one if you already own other woolen jackets of a similar caliber.

Extra Small Small Medium Large Extra Large XXL
Body Length 27.5" 28" 28" 28.5" 29.5" 29.5"
Pit to Pit 21" 22" 22.5" 23.5" 25" 26"
Shoulder to Shoulder 17.5" 18" 18.5" 19" 20" 20.5"
Sleeve Length 24" 24.5" 25" 25.5" 26" 27"
Size guide

How to Measure for a Mammoth

The Mammoth is coming back in stock soon! Sign up for the email list for the most up-to-date information.

Introducing the first collaboration between The Iron Snail & Unbleached Apparel. This is The Undyed Mammoth. For this collaboration, we've wandered off to the UK, stopping at the 243-year-old legendary mill, Marling & Evans. Marling & Evans is a specialty mill, utilizing naturally colored wools without any added dyes. They are, without a doubt, peerless in their expertise.

The Undyed Mammoth is precisely what it sounds like, completely undyed. You're gazing upon a 22-oz./LY mix of the horned Jacob sheep and the Welsh Mountain Black Sheep with a matching 11-oz./LY Wind Wall lining. The wool is 100% undyed, utilizing the natural color of the two sheep breeds. Furthermore, this Mammoth's labeling system is made from woven Foxfibre® (a naturally colored and undyed cotton), the included patch is a debossed vegetable-tanned leather, and the buttons are made from horn, a naturally dark and individually unique material.

This Mammoth's fabric is made from low-twist yarns and has a soft drape with a plush hand. While still retaining all of the properties of wool that we love (warm when wet, antibacterial, flame retardant, odor resistant), this Mammoth weave is slightly looser—meaning a Primordial Mammoth will have a slightly higher wind and rain resistance and would be suited better for extreme foul weather. Although this is absolutely no slouch and will last and protect you for a lifetime, at least.

Specs at a Glance

- 22-oz./LY undyed woolen outer
- 11-oz./LY undyed woolen lining
- Solid brass snap action clip
- Wind Wall Technology
- Medium weight storm cuffs
- Locking Collar
- Cut and Sewn in USA from UK wool

The Tale of The Mammoth

The Tale of The Mammoth is the first part of "The Lore Series". "The Lore Series" covers the lore of The Iron Snail far before The Prologue and Chapter Series began. Tales of the mightiest creatures in all universes will reside here, a necessary backstory to understand all of the Snail's powers.

The purchase of a Mammoth will also include:

A booklet of the tale (with blank pages to be used as a notebook) and a Mammoth patch.

The Undyed Woolen Outer

"The Mammoth" is crafted from double-layered 22-oz./LY wool, with reinforced front pockets and a Wind Wall. The inaugural edition of, "The Undyed Mammoth," comes in a rich, deep brown and beige— the colors of nature, baby! This wool, like the sheep it comes from, is incredibly hardy and can endure brutal temperatures and conditions.

As mentioned above, The Undyed Mammoth is formidable in any environment. However, if you frequently face grueling storms, we suggest checking out our Primordial Mammoth, which features high-twist yarns and a denser weave for even greater resilience.

The Perfectly Suited Lining

Touching your skin is an 11-oz./LY woven wool lining crafted from the same fibers as the body fabric. We've applied a pressed finish to smooth the fabric and push stray fibers down, making the lining more comfortable while allowing the sleeves to glide better over your mid-layer.

What are the benefits? By exclusively using wool fibers, we’ve been able to modify the traditional structure of a woolen jacket to keep it sleek yet exceptionally warm (more on that later). This also ensures it’s comfortable enough to wear with just a T-shirt.

The yarns used in the lining are finer and more densely woven than those in the body fabric. This enhances wind and water resistance, provides a smoother handfeel, and gives the Mammoth a significant warmth boost, especially in foul weather. In fact, the liner, protected by the woolen outer layer, outperforms standard wool in terms of warmth-to-weight ratio.

No kidding!

The Wind Wall

Ah, 'Wind Wall Technology', something we're quite proud of! As mentioned earlier, we've chosen to craft this jacket entirely from 100% wool, giving us the flexibility to rearrange the typical layout (layers) of a wool jacket. Let us elaborate. We've meticulously placed the jacket's lining between the main body fabric and an interior chest and back plate made of wool. We gushingly refer to this as 'Wind Wall Technology.' The outermost layer of wool shields against the elements, the lining further stops the wind, and the interior wool plates (crafted from the outer fabric) act as unencumbered insulation. You could think of 'Wind Wall Technology' as an additional woolen blanket inside your jacket. Imagine an internal cape coat with an extra layer of warmth in between.

The Mighty Storm Cuff

Hidden inside of the sleeves are storm cuffs. Knit specially for us in Massachusetts. The cuffs are a midweight 1x1 ribbed Merino from the legendary Shaniko Wool Company, the first U.S. Farm Group to supply certified wool under the Responsible Wool Standard (RWS). The cuffs grip your wrists and create a gentle seal around them. A.k.a. these cuffs are sewn in to prevent wind, rain, and snow from entering your sleeves. Nobody likes that.

Note: here we're showing dyed cuffs from our Primordial Line. The Undyed Mammoth will feature cream colored, undyed Merino cuffs. Our sample is using a temporary fabric and we'd rather avoid the confusion!

The Handy Action Clip

North of the storm cuffs and tucked into the left pocket is an action clip—a brass clip that allows you to hang your gloves, mittens, whistles, keys, or whatever else you may have from your jacket while you focus on other matters (like fending off all the compliments on your jacket). On the top left corner of the clip is an extra drilled hole meant for a keyring, so you can add any accessory you wish.

We've included the action clip with exploration in mind, but we're eager to see what you decide to snap on. 

We're particularly fond of those tiny jean keychains that you can get from many Japanese denim manufacturers.

On a more serious note, a neon orange whistle will probably come in handy one day if you're an explorer.

The Locking collar

Even further north of your action clip is the collar. A collar, of course, is something to be expected on any jacket and may not seem special at first. 

However, upon further inspection, this one is. Built to either lay flat or be popped up to protect the wearer's neck from the elements, the collar comes with an extra horn button sewn on in order to fasten it closed when in stormy weather. These same horn buttons are sewn throughout the jacket, securing pockets and the main placket.

Toss on a hat of any sorts and along with the locked collar, you can walk around with a covered and warm face, even sans scarf. 

The Real Horn

Often used in fine suiting, we've opted to use genuine horn buttons on 'The Undyed Mammoth'. We wanted buttons that blended into our fabric but finding buttons without plastic or dyes that achieved the same variance was quite tough, until...horn! Perhaps there are some more tricks up our sleeves that we'll introduce later as well.

Real horn (typically from either water buffalo or ox) is a by-product of the farming industry, particularly in India and livestock is not reared specifically for their horn. Moreover, the cattle are raised by numerous small, subsistence farmers and the money they receive for their horn is a vital and additional source of income. Without it, many rural farmers would simply abandon their vocation.

Horn is, of course, a natural material and thus, no two buttons are the same. Each will have its own patterns and color variations.

Customer Reviews

Based on 5 reviews
60%
(3)
20%
(1)
20%
(1)
0%
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A
A.M.

I loved everything about the jacket. The only thing I was not a fan was the undyed cuff was a little bit loose. I’m 6 foot 220 pounds and chose the XL it fits perfectly.

n
nicholas cavallari
burly and confidence building

i was lucky enough to score this beauty probably a return, the wool is the story, has some bulk, looks great with a stetson. the fit at XXL is more snug then my Filson cruiser. i'm cool with the interior cuffs, but i could see how it might irk someone else. love the British fabric and it being USA made. enjoy the story and details behind this product when so many other brands wont talk about sourcing or origin.

K
Khang

This is a fantastic coat, but there are a few things to note:
1. It fits smaller than your typical Filson coat—about 1.5 sizes down—with higher armholes and less room in the sleeves.
2. The undyed wool (mammoth) is a bit rough against the skin, especially around the armholes, which is expected with this kind of thick material.
3. As another reviewer mentioned, there’s some bunching at the storm flap.
4. The interior pockets could be larger and would benefit from closures like buttons or zippers.

Overall, it’s a sharp-looking coat with phenomenal material quality—ideal for someone with an average build. At 5’11” and ~240 lbs with broad shoulders, I found the XXL to be tight. For a better experience with this kind of wool, I’d definitely recommend wearing a long-sleeve layer underneath to help with the scratchiness.

A
Anonymous
Almost amazing

Everything is perfect except the storm cuffs messing up the sleeve silhouette in the form of bumps by the wrists. I would normally keep it but because it cost so much. I want it to be perfect. I will be returning mine sadly.

A
Arif J
Amazing jacket

Super heavy beautiful fabric well constructed another amazing creation by the iron snail

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