I brought this on final sale.  The jacket is just too long.  Note that Mammut jacket are usually quite slim, but this one is typical of North American size.

A versatile, classic fleece jacket.

The Aconcagua is a classic fleece jacket for sporty lifestyles. Now in its third generation, it still holds its own on expeditions, long and short outdoor adventures and is also suitable for everyday wear. The Polartec® Power Stretch® Pro material is comfortable and ensures you can always move freely thanks to its flexible 4-way stretch material. The fleece fabric keeps you warm, efficiently wicks away moisture and dries quickly. The Aconcagua has a tight fit, making it your go-to mid-layer for wearing under a hardshell layer. Its tried and tested features and timeless design also make the jacket perfect for wearing on its own when hiking, climbing or just enjoying your free time. The Aconcagua is made to offer superior quality, is extremely rugged and always keeps its shape.

• Athletic fit (Fit like the current Arc'teryx Kyanite)
• Suitable for: Hiking, Mountaineering, Climbing, Skiing, Ski Touring
• UV protection: UPF 50+
• Very robust, warm, elastic Polartec® Power Stretch® Pro™ with super-abrasion-proof nylon surface
• The colors black and white are dyed using the solution dye process, which conserves resources for a reduced environmental impact
• High, tightly sealing collar
• High-quality flat chin guard and zipper underlay
• Raglan sleeves to avoid pressure points around the shoulders
• 2 backpack-compatible side zipper pockets
• Functional thumb loop closes neatly at the opening

Materials
• Main: 52% Polyester, 39% Polyamide, 9% Spandex