A Closer Look at Three of Y’2 Leather's Classic Designs Part 1 of 3: The Jean Jacket 140 Series

140, 42, 76. Do these numbers ring a bell? If so, you are a bona-fide Y'2 aficionado. Each of our products have a serial code, and the number portion indicates the sewing pattern. These are the “jersey numbers” of some of the most iconic designs in our roster, some of our most long-selling, beloved models. This blog post is the first in a three-part series taking a closer look at three classic designs. Let's start off with the 140, a jean-jacket type leather jacket.

Slip into the finest leather sewn with exceptional skill

The number 140 is the official number assigned to our “G-jan” or jean jacket-type leather jackets, a cornerstone of Y'2 Leather’s classic lineup alongside our car coats and riders jackets. Inspired by historically iconic vintage denim jackets, we re-interpreted the designs using leather. Our jean jacket lineup, including the 1st model (140), WWII Type (T-140) and the 2nd (141), is incredibly popular and sells out every season. These jackets feature signature layered front pleats that mirror their denim origins. Since leather is a much thicker and tougher material than cotton, crafting these details demands exceptional effort and skill. The dynamic front view contrasts with the striking simplicity of the back, made from a single, unblemished sheet of fine-grained leather. We opted not to include a back-buckle characteristic of many vintage denim jackets, to really let the leather’s quality shine.

A different personality brought out by each type of leather

The 1st, WWII and 2nd models share this dynamic design, but their unique signatures lie in details like the pockets and buttons. The 1st and WWII feature laurel-wreath buttons, while the 2nd introduces an original engraved button this season. And that's not to mention the variations in color and leather types: Kakishibu, Indigo, and Eco Horse, Aniline Horse, Horse Roughout, Steer Roughout, and new this season, Sheepskin. Each variation reveals unique qualities, with a distinct aging process to enjoy.

Kakishibu Horse develops a rich patina over time, while Indigo Horse fades like denim. Eco Horse transforms to fit the shape of the wearer after long-time use. Aniline Horse lends the jean jacket an elegant aura. Sheepskin offers a soft, pliable feel and a comfortable fit. Horse and Steer Roughout provide a light, shirt-like suppleness. Each variation reveals a different personality, feeling totally different when worn, making you want a second, then a third…

My last word: The lining fabric choices

It’s not just the leather that makes these jean jackets special–the linings are also an essential component. Instead of highly insulated materials like wool blends or brushed cotton, the Horsehide models use an original linen-cotton mix, while the Roughout and Sheepskin use cupro. Horsehide’s linen-cotton mix provides breathability, so you can throw it on over a t-shirt in the spring and autumn as well as winter. It’s all about the layering–on cold days you can wear it over a thermal t-shirt, and on especially cold days, a light sweatshirt, so you can extend the amount of days you spend wearing it in. Meanwhile, the Roughout and Sheepskin use the silky smooth cupro, so its wearer can enjoy the shirt-like feel of the soft leather.

I hope you enjoyed this deep dive into some of the finer details of our jean jackets! We believe a deeper understanding will help you choose the jacket that is right for you, and those who already own one of our classic models can feel even more attached by learning about its ins and outs.