Mammut Alto Light HS Hooded Jacket Men - Black, Size S

The Mammut Alto Light HS Hooded Jacket is the ultimate lightweight hardshell for mountaineers who refuse to compromise on protection or pack weight. Unlike heavier shells that add bulk, this jacket packs down to almost nothing, yet delivers a 20,000 mm waterproof rating and fully taped seams to keep you dry in the worst alpine storms. The 3-layer DRYtechnology Performance fabric breathes at 20,000 g/m²/24h, so you stay comfortable during high-output ascents. With an athletic fit, helmet-compatible hood, and PFC-free DWR, it’s built for fast, light missions where every gram counts.

Highlights

• Extremely lightweight and packable – fits into its own pocket
• Mammut DRYtechnology Performance 3-layer laminate: waterproof and breathable
• 20,000 mm water column and 20,000 g/m²/24h breathability
• Fully taped seams and water-repellent YKK zippers for complete weather protection
• Adjustable, helmet-compatible hood with reinforced brim
• PFC-free DWR treatment and bluesign® certified fabric
• Athletic fit with elasticated cuffs and adjustable hem

In daily use

On a multi-pitch route or a fast-and-light trek, the Alto Light HS Hooded Jacket disappears into your pack until the weather turns. The moment rain or wind hits, you pull it on and get instant shelter: the hood adjusts over your helmet without restricting vision, the high collar seals out drafts, and the two zippered side pockets keep essentials secure even with a harness. The athletic cut reduces flapping in high winds, while the breathable membrane prevents that clammy feeling during steep climbs. When the sun returns, the jacket stuffs into a tiny bundle, ready for the next squall.

Full specifications

• Product type: Hardshell jacket for men
• Main material: 100% Polyamide
• Membrane: 100% Polyurethane (Mammut DRYtechnology Performance 3-layer)
• Waterproof rating: 20,000 mm water column
• Breathability: 20,000 g/m²/24h
• Fit: Athletic
• Hood: Adjustable, helmet-compatible
• Pockets: 2 zippered side pockets
• Zippers: Water-repellent YKK
• Seams: Fully taped
• Cuffs: Elasticated
• Hem: Adjustable with drawstring
• Sustainability: PFC-free DWR, bluesign® PRODUCT
• Packability: Very small packing volume
• Intended use: Mountaineering, hiking, trekking

Final note

For alpinists who demand storm protection without the weight penalty, the Mammut Alto Light HS Hooded Jacket is the smart choice. Pack it, trust it, and move fast in the mountains.