Get 10% Off Your First Purchase - Subscribe Now Get 10% Off Your First Purchase - Subscribe Now


The Hammer Straight - Indigo Raw 17.5oz Mammoth Selvedge

SKU 301158205-30

We are very excited to offer our first heavyweight denim! We pushed the limits of our 4-Way Stretch Selvedge to create The “Mammoth” 17.5oz 4-Way Stretch Selvedge. Nick Noguchi worked closely with a renowned Japanese mill to develop this one of a kind denim. For these new jeans, we went with a special Bordeaux Red selvedge ID, polished silver buttons, and a navy leather patch.

Heavyweight denim is uncommon because of how difficult it is to produce. Combining this heavyweight with our 4-Way Stretch Selvage results in a next level denim exclusive to Kato. This denim has the same look and comfort of our lighter 4-Way Stretch Selvedge, but is thicker and even more durable.

Why heavyweight denim? The thickness of the denim plays a big part in how the denim fades. The thicker the denim, the more pronounced the creasing will be. This creasing contributes to an increased contrast and definition of the fades. The stunning results of a pair of well worn heavyweight jeans is why denim connoisseurs around the world seek out these heavier denim weights.

The new “Mammoth” 17.5oz 4-Way Stretch Selvedge is available in Raw indigo denim and two distinct washes that have been carefully aged by hand. These three versions represent the different stages of denim jeans over the first several years of wear.

The original Raw indigo denim is a blank canvas for you to develop your own unique pair that ages according to your lifestyle and experiences. The Raw Indigo “Mammoth” is available in The Pen Slim, The Hammer Straight.

These jeans are heavier material and they take time to break in.  For a comfortable fit, we advise opting for one size up.

• Straight fit

• Indigo Raw 17.5 oz


• 4-Way stretch selvedge denim

• Made in USA

• Model is 5'11" and wearing size 32.


the details
4-way stretch selvedge
Premium japanese fabric
made in usa
ykk & premium hardware
vintage inspired

Customer Reviews

Based on 6 reviews
Henry Ting
The best jeans I ever own.........period.

A perfect pair of jeans. This is my 2nd pair of Hiroshi Kato jeans. I love the flawless workmanship where every stitiching is perfect and the form factor fit me perfectly. At first I thought the heavyweight 17oz denim might be too thick and stiff for me, but it is not. In fact, although the denim is heavier, but it drapes very nicely without the cardboard feeling. I had it hemmed and after one wash it hasn't shrunk at all. Yes, these jeans are not cheap, but they will last a long time. I also like the practicality of the zip flies instead of the retro buttoned flies which to me is a step back and an unnecessary hassle.

Thank you for your glowing review! We take great pride in our flawless workmanship and are happy to hear that the fit is perfect for you. -Kato Team

Anupam Awasthi
Perfect pair

One of the best hammer straight jeans. Absolute gem!

Thank you for your positive feedback on The Hammer Straight - Indigo Raw jeans! We're thrilled to hear that they are one of your favorites and hope they continue to serve you well. Thank you for choosing Mammoth Selvedge.
-Kato Team

Pan S.
Heavy Duty Built Tough

Best of the Hammer line up in my opinion. You can tell a lot of thought went into the design element. The jeans are a bit tough and first wear, but they’ll become better over time. Do yourself a favor and cop a pair.

Thank you for the great feedback on our Hammer Straight jeans! We're happy to hear that you appreciate the design and durability of this particular style. We understand that they may be a bit tough at first, but we're confident that they will become even better with time. Thank you for choosing our product and we hope you continue to enjoy them.
-Kato Team

Bruce Clark
Excellent denim, could use some length.

I’m a fan of soaking before starting the journey and did that with this pair. The denim quality is excellent and the 4-way fabric is outstanding per usual. Kato’s Hammer cut is straight with a a reasonable slimness that for me (size36) drops to a 8.25” leg opening after the soak.

I’m finding the length did shorten up a bit post soak by about .5 or .75”. This brings the length to 33.5 or so for me, which makes cuffing tough and stacking near impossible. I wish these larger sizes had a longer inseam 35 or 36 but that’s the only complaint. But. Still a five star product.

Thank you for your feedback on The Hammer Straight - Indigo Raw 17.5oz Mammoth Selvedge. We appreciate your support and are glad to hear that you are enjoying the denim's quality and 4-way fabric. We understand your concern about the length and will take note of your suggestion for longer inseams in larger sizes. We value your input and hope you continue to enjoy our products.
-Kato Team

The Best

Well, I have been looking for the perfect jeans for many years. Honestly, it has been a frustrating journey. I finally found it in 17.5 Hammer Straight Indigo. Perfect fit, detail and construction. The 17.5 oz is more comfortable than any of the 12 and 14 oz I’ve had. Kato has mastered the 4 way stretch selvage. I bought 3 pair. Have worn no other denim since they arrived. I’ll be a customer for life.

Thank you for sharing your positive experience with our Hammer Straight Indigo Raw 17.5oz Mammoth Selvedge jeans. We are happy to hear that the 17.5 oz fabric is more comfortable for you compared to other weights. We hope to continue providing you with high-quality denim and thank you for being a loyal customer.
-Kato Team

Back to top
Back to the top