Built for bitter cold, long belays, and the kind of winter missions where stopping means losing heat fast, the Taiss Pro Belay IN is Mammut’s answer to serious alpine insulation. Designed to fit over your hardshell without restricting movement, this belay parka delivers an incredibly technical balance of warmth, durability, and weather protection. DRY DOWN insulation brings high loft and reliable performance even in damp conditions, while strategic synthetic fill reinforces high-wear zones and keeps insulation consistent where it matters most.
The 10D Pertex® Quantum Pro shell adds impressive abrasion resistance for its weight, shrugging off ice, pack straps, and rough granite with ease. Boxwall construction eliminates cold spots, allowing the down to fully loft and trap heat efficiently, and an internal neck gaiter locks in warmth during exposed belays or frigid transitions. With oversized VISLON® zippers, glove-friendly pulls, and high-set pocket placement, the whole design stays functional even when you’re layered up and moving in full winter kit.
From bivy ledges to mixed-climbing objectives, this is the belay jacket built to keep you warm enough to stay sharp and keep climbing.
FEATURES
Ultralight 10D Pertex® Quantum Pro shell with PFC-free DWR for excellent weather resistance
Pertex® Diamond Fuse technology for superior abrasion durability
DRY DOWN hydrophobic 850-fill insulation for maximum loft in wet conditions
High-loft synthetic insulation in shoulders, forearms, and collar for targeted durability
Boxwall construction for even warmth and zero cold spots
Climbing-helmet-compatible hood with 1-point adjustment
Oversized 2-way VISLON® front zipper with easy-repair slider
Snap storm flap allowing half-zip for harness access
Two harness-friendly hand pockets, one chest pocket, and two internal Powermesh storage pockets
Internal neck gaiter to seal in warmth
Stretch cuffs with soft fleece backing
High-mounted adjustable hem to lock in heat
Packs into included storage bag
Responsible down, PFC-free finishes, and recycled materials throughout
SPECIFICATIONS
Fit: Relaxed
Weight: 547 g
Main Material: 100% Polyamide (recycled), 10Dx10D
Fill Power: 850 cuin Mammut Down
Fill Weight (Down): 187 g
Synthetic Insulation: 120 g/m² (shoulders + forearms)
Lining: 100% Polyamide (recycled) + stretch inserts
Best For: Climbing, mountaineering, winter belay use
