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The Alto Guide HS is Mammut's technical all-rounder hardshell: a 3-layer DRYtechnology Pro membrane rated to 20,000 mm waterproofing and 20,000 g/m²/24h breathability, with stretch for climbing movement. It carries mountaineering details most hiking shells lack: a helmet-compatible hood with a reinforced peak, backpack-friendly chest pockets, and a two-way front zip that opens from the bottom for harness and belay access. At 472 g it sits in the middle of the shell market, lighter than burly alpine jackets but heavier than ultralight rain shells. Owners rate it highly as a durable, do-everything mountain jacket; the trade-offs are a regular cut that layers over a midlayer but not much more, and a feature set that is more than casual hikers need.
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In stockShips from abroad · duties may apply
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Lowest price we've seen: $157.05 on Nov 9 at Steep & Cheap. Tracked across 10 stores since Nov 9.
With 142 ratings averaging 4.6 out of 5, owners treat the Alto Guide as a dependable mountain shell. They praise the weather protection, the stretch fabric and the climbing-specific details; the main complaints are the trim fit over thick layers and the lack of pit zips.
The Mammut Alto Guide HS Hooded Jacket is a men's technical shell for day hikes and first mountaineering trips. It is made from Mammut DRYtechnology Pro 3-layer material, which is stretchy, durable, breathable, waterproof and PFC-free.
The hood fits over a helmet and has a reinforced peak. A 2-way zipper gives easy access to a climbing harness, and the front pockets are compatible with a backpack. The jacket has a regular fit.






