"What Our Gearhead® Experts Are Saying:""I use the Taiss ML Hooded Jacket for high-output mountain days when breathability matters as much as warmth. The Polartec Power Stretch Pro fabric moves easily, dries fast, and never feels clammy on the climb. The hood fits well under a helmet, and the thumb loops are great when layering under a shell.""We rely on the Taiss ML Hooded Jacket from Mammut for year-round mountain missions where versatility is key. From cold alpine starts to long days gaining elevation, it delivers the right balance of warmth, stretch, and moisture management to keep us moving efficiently. Made with Polartec Power Stretch Pro fleece, this midlayer offers excellent warmth-to-weight performance with four-way stretch for unrestricted movement. The breathable fabric wicks moisture and dries quickly, while the athletic fit layers cleanly under a hardshell. A helmet-compatible hood, integrated thumb loops, and high-set pockets designed to work with a harness or backpack make it a dependable layer for technical terrain."