Exploring the Appeal of Mammut's Classic Fleece "Aconcagua Jacket'

Mammut, a world-renowned outdoor brand born in Switzerland, is well-known for its products that mountaineers trust greatly, including climbing ropes and communication devices called "beacons" used for searching those buried in snow due to avalanches.

Among its many offerings, the "Aconcagua Jacket" stands out as a classic. Many people may have come across this fleece jacket adorned with the mammoth mark’s classic logo.

This time, we focus on the Aconcagua Jacket and spoke with Shota Utsugi, Assistant Brand Manager at Mammut Sports Group Japan, Inc., to learn more about its history, details, and materials.

From Decades of Rope Production to an Outdoor Brand

Mammut has a long history, dating back to 1862, and it began producing apparel in the 1980s, making it around 40 years old. Let's begin by delving into Mammut's roots.

"Initially, the business started with the production of ropes for agricultural tools, but their toughness led them to be widely used for climbing. By the 1980s, Mammut's ropes were so well-loved among Japanese climbers that they were commonly referred to as 'Mammoth Ropes,' spreading their reputation worldwide.

"Then, in the 1980s, the brand introduced its apparel collection. In the 1990s, the release of the world's first high-performance soft shell pants garnered attention. By 1995, the creation of Mammut's top-tier climbing apparel collection, the 'Extreme' series in collaboration with athletes, helped the brand gain significant recognition as an outdoor brand."

Now that we've covered Mammut's roots, let's discuss the origins of the item we are looking deeper into, the Aconcagua Jacket.

"When it was launched in 1997, it was initially called the 'Aconcagua Pull,' designed as a pullover. During that time, many brands released fleece pullovers, making them quite mainstream. More than being seen as a jacket, it was primarily recognized as an alpine inner layer.

"Interestingly, while many current Mammut products feature the brand logo on the right chest and the classic logo of the mammoth mark on the left sleeve, back then, the regulations were not as strict, allowing the classic logo to be placed on the left chest."

Release of Full-Zip Version Leading to Current Design

The Aconcagua Jacket that continues today was released as a full-zip model around 2007.

"Looking back through past catalogs, the Aconcagua Jacket appears starting in 2007. It featured a full zip, with the brand logo on the right chest, the classic logo on the left sleeve, and a vertical zip pocket on the chest, resembling the current design, although side pockets were still absent.

"Outdoor wear has been seamlessly integrated into everyday clothing due to its comfort. Similar to this Aconcagua Jacket, its versatility allowed it to be used casually, which led to demand for side pockets, culminating in the current model."

Aconcagua Jacket Continues to Evolve

After the birth of the Aconcagua Jacket, evolved models like the Aconcagua Hooded Jacket and the Aconcagua Light Jacket were released, carrying on its DNA. Let's delve into these items as well.

"Significant evolutions include the advent of the Aconcagua Hooded Jacket with a hood and the light version, the Aconcagua Light Jacket.

"Since the 1997 release, as versatility increased, the demand for a hood fitting certain situations arose. In the 1990s, there wasn't much of a concept of speedy climbing, and those prioritizing warmth often wore balaclavas, but in place of that, the Aconcagua Hooded Jacket with a hood that fits closely around the head and face emerged.

"Moreover, the need for items suited to less cold regions or seasonal and environmental changes increased, leading to the release of the thin fleece Aconcagua Light Jacket. It seems the best way to cater to these varying needs was to modify only the essential parts of the Aconcagua Jacket without drastically changing its shape."

The Fleece Fabric of the Past & Present Comes from "Polartec"

The Aconcagua Jacket has been using fleece fabric from "Polartec" since 1997. Polartec is a long-established fabric manufacturer, known for developing fleece fabric. This fleece fabric has also evolved over time.

"The Aconcagua Jacket has consistently used Polartec fleece, but the fleece fabric itself has evolved over the years, resulting in changes to its texture and functionality.

"Currently, it uses a fleece fabric known as 'double face,' where only the backside is brushed while the surface remains unbrushed. In the 1990s, 'microfleece' was the mainstream fabric. This type would lose its fluff and become shorter due to wear and washing, but by using the double face, the surface's abrasion resistance has increased, helping to prevent functionality from degrading due to friction while layering.

"Moreover, the lightweight Aconcagua Light Jacket uses a fleece fabric referred to as 'grid.' This fabric also features a double face but has a checkered pattern on the inner pile, offering excellent breathability and moisture-wicking properties for comfortable wear."

Since its inception in 1997, while there have been minor changes and updates, its core strength lies in the fact that it has not drastically changed over the years. This may indicate that it has already reached an almost perfect form.

Through this discussion, I realized that there are reasons why classic products endure and continue to be chosen by many. The Mammut Aconcagua Jacket is definitely a piece I want to add to my wardrobe.