The Mammut Aconcagua ML Fleece Jacket is a purpose-built midlayer that balances warmth, breathability, and packability in a clean, versatile design. Part of Mammut's renowned Aconcagua range, this fleece takes its name from South America's towering 6,961m peak — a fitting nod to the jacket's mountain-ready credentials.
Constructed from a soft, midweight (ML) fleece fabric, the Aconcagua delivers excellent warmth-to-weight performance. The material provides efficient insulation while remaining highly breathable, making it ideal for aerobic activities where temperature regulation is key. Whether you're ascending a ridge or moving quickly on a trail, this jacket manages moisture effectively to keep you comfortable throughout the day.
The full-length front zip allows for quick ventilation adjustments, while the athletic, body-close fit ensures the jacket sits smoothly beneath a hardshell or waterproof layer without bunching. Zippered hand pockets provide secure storage for essentials, and elasticated cuffs and hem help seal in warmth and keep the elements at bay.
Backed by Mammut's 160+ years of alpine expertise, the Aconcagua ML Fleece Jacket is a dependable choice for anyone seeking a high-quality midlayer that performs in the mountains and feels great in everyday life.
