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The Iron Snail

The Mammoth Woolen Jacket

The Mammoth Woolen Jacket

Regular price $550.00 USD
Regular price Sale price $550.00 USD
Sale Sold out

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

Pictures are of the production sample, the top right button will match all other buttons.

Everyone needs an heirloom woolen jacket. A jacket that can be proudly passed down through generations; a makeshift blanket, a cape, a cold weather companion. The goal of "The Mammoth" is simple; to be, and remain, unstoppable, to live up to its own name, to be the de facto best woolen jacket on the market. We hope The Mammoth can be yours. Let us introduce you two.

The Mammoth" at its thinnest point is 37-oz./LY of some of the finest wool available and, at it's thickest, a staggering 65-oz./LY. This jacket is so robustly built in fact, we debated on including a warning label with the care instructions.

Please, make sure to layer properly when venturing on daring excursions with "The Mammoth". It's beyond warm.


  • 28-oz./LY twill outer
  • 9-oz./LY faille woven worsted wool lining
  • Solid brass snap action clip
  • Wind Wall Technology
  • Heavy duty storm cuffs
  • Locking Collar
  • Made in USA


We'd recommend you stay true to your size -- this jacket is built to layer but isn't terribly oversized!
Extra Small Small Medium Large Extra Large XXL
Body Length 27.5" 28" 28" 28.5" 29.5" 29.5"
Pit to Pit 20.5" 21.5" 22.5" 23.5" 25" 26"
Shoulder to Shoulder 16.5" 17" 17.5" 18" 19" 19.5"
Sleeve Length 24.5" 25" 25.5" 26.25" 27" 27.75"
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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 Hoxie Woolen Outer

"The Mammoth" is crafted from double-layered (front pockets & Wind Wall) 28-oz./LY 2x2 twill melton wool woven exclusively for The Iron Snail. We've dubbed this mighty fabric, Hoxie Wool. The inaugural edition of "The Mammoth" features an oversized check pattern in a rich brown and soft charcoal, colors you'll be rather familiar with when walking around the New England wilderness (where the wool was spun into yarn and woven).

This fantastically dense wool is designed to endure the harshest elements effortlessly while remaining breathable, fire-resistant, and anti-bacterial. Moreover, it provides insulation, even when wet.

The Perfectly Suited Lining

Touching your skin is a 9-oz./LY faille woven worsted wool fabric, often used in fine suiting (to prevent itchiness and further block the wind). We chose this lining specifically to keep 'The Mammoth' 100% wool. This is a feature you will rarely ever find on another jacket.

What are the benefits? Well, by not working with other fibers, we can modify the traditional layout of a woolen jacket to keep it sleek, yet extra warm (more on that later), while also ensuring it can be comfortably worn with just a t-shirt.

The wool fiber used in the lining is finer than the fiber used in Hoxie Wool. Besides being softer against the skin, finer wools allow more air to be trapped in the yarns. This means that the liner, kept safe by the Hoxie Woolen outer, outperforms your average 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 Los Angeles, California, heavyweight 2x1 ribbed acrylic 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.

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 corozo nut button sewn on in order to fasten it closed when in stormy weather. These same corozo nut 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 Hardiest Nut

Vegetable ivory— that's what they call it these days. Some refer to them as tagua buttons, while others prefer the term corozo nut buttons.

Tagua nuts have been carved into figurines, coins, buttons, etc., for the better part of forever. But what exactly is it? According to Wikipedia,

"Vegetable ivory or tagua nut is a product made from the very hard white endosperm of the seeds of certain palm trees."

Simply put, corozo nut buttons are individually unique, incredibly hard, lightweight, sustainable, and biodegradable. It's no wonder they were some of the most popular buttons used worldwide in the 1930s.

Here's a fun fact: a tagua palm can take 15 years to mature, but once it does, it can produce tagua nuts for up to 100 years.

Customer Reviews

Based on 27 reviews
Bryan Nguyen
Sturdy as it gets

Absolutely love the jacket. Fit has been spot on and overall comfortable for being a wool jacket. The details are impressive and I love the finishing. Others have talked about the storm cuff being tighter which will apparently be improved in future versions, so outside of that I am very pleased with this jacket and would recommend for anyone. Worth every penny!


It's not good........Because it's amazing!

This is the first wool jacket I've ever bought, and I'm glad it was the Mammoth. The jacket is built like a tank, I don't see how I could ever reasonably do anything to damage this beast of a jacket, and I expect that I'll be wearing it for many, many years. Like some people have said, the storm cuffs are slightly loose, but I don't really mind because I layer the jacket with a hoodie anyway (not that I need to because it's so warm) one thing I really appreciate is how the jacket isn't itchy, I have really sensitive skin and flare-ups happen easily with me, but this isn't the case with the Mammoth. This just feels like a product that was made with a lot of love and a lot of attention to detail, and it really shows, this is definitely a jacket that I'm proud to own.


This isn’t mine but I think my brother really loves it. 5/5


Very good jacket. I have worn it in both rain and snow no problems. The large pockets are amazing, especially the duck pocket. The wool has a very nice texture and the subtle check pattern is just amazing. I’ve also gotten compliments almost every time I’ve worn it which is pretty cool. As others have mentioned the storm cuffs aren’t as tight as other jackets, but it’s not really a problem for me since it makes the jacket easier to layer compared to jackets with tighter storm cuffs. If I had a suggestion for future versions it would be to add a small interior chest pocket with a button on it for small items like chapstick, train tickets, receipts, etc.

Andrew Lopez

The Mammoth Woolen Jacket