Mammut Taiss IN Hooded Jacket

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Lightweight, warm, and highly functional, the Taiss IN Hooded Jacket is a reliable choice for demanding alpine environments.

Mammut says: 

Whether an insulating or outer layer, this down jacket will keep you warm in harsh mountain conditions while providing the lightest form possible. It achieves its incredible warmth-to-weight ratio with an ultra-light, durable recycled nylon shell featuring weather-resistant coating, along with filling from responsibly sourced, hydrophobic 850-fill down that insulates even in wet conditions. Carefully situated, the synthetic filling provides warmth in areas that need to withstand a lot of wear and tear. Thanks to its minimal weight and packing volume, you’ll take the Taiss IN Hooded Jacket on tour without a second thought.

All Mammut products purchased within the Europe come with an extended 30-month warranty period. For more details click here.

Our Verdict

The Mammut Taiss IN Hooded Jacket delivers impressive warmth and versatility in a lightweight, packable design, making it an excellent companion for alpine and cold-weather adventures.

Filled with 850-fill hydrophobic DRYDown, this jacket maintains warmth even in damp conditions, while strategically placed synthetic insulation adds durability in high-wear areas. The Pertex Quantum Pro shell, made from recycled nylon, offers durability and weather resistance, bolstered by a PFC-free DWR treatment. Weighing 358g (size M), it balances insulation with portability and can be stowed into its own pocket for easy packing.

Designed for active pursuits, the jacket features pre-shaped sleeves, an adjustable hood compatible with helmets, and a two-way front zip for harness access. The fit is streamlined yet allows for a full range of motion, making it suitable for climbing, trekking, or technical mountain use. Its minimalist design includes two side pockets for small essentials and an adjustable hem for added weather protection.

While the jacket excels in providing warmth in cold conditions, it may feel overly insulated for milder climates or high-intensity activities.

– Reviewed by Ultralight Outdoor Gear

Features

• 850 fill power DRYDown insulation (110g) with hydrophobic finish
• Body-mapped synthetic insulation ( 80g/m2)
• 1-point adjustable hood
• YKK Vislon® 2-way zipper for smooth operation
• Two zippered side pockets
• Jacket can be stowed in side pocket
• Pre-shaped sleeves
• Pre-shaped cuffs
• Adjustable hem

Specifications

• Small weighs: 344g
• Medium weighs: 358g
• Large weighs: 383g
• XLarge weighs: 407g
• Cut: Regular Fit

Material & Construction

• white goose down
• 90/10
• 850cuin
• nikwax pfc free dwr
• rds
• dark spot 0.3%
• Denier (main material): 10Dx10D
• Lining 1 (B2B): recycled nylon downproof
• Filling (B2B): recycled synthetic insulation
• Pertex® Quantum® Pro
• Mammut Down 850 cuin
• Main Fabric 2 (B2B): pertex® quantum pro
• Main Fabric 1 (B2B): pertex® quantum pro
• Recycled
• PFC-free DWR
• Responsible down
• Fair Wear

Help & advice:

• The Ultimate Guide to Choosing an Ultralight Down Jacket
• Down Quality
• All About Down
• Hydrophobic Down
• Responsible Down Standard
• Ethical Down