For alpine missions, thru-hikes, and unpredictable weather, the Alto Light HS Pants are your go-to solution for featherweight protection with full-weather confidence. These ultralight hardshell pants are engineered with 2.5-layer Mammut DRY Tour laminate, offering 15,000 mm waterproof protection and windproof performance in a streamlined, low-bulk silhouette that’s easy to pack and fast to deploy.

Made for agility and comfort, the lightweight stretch fabric moves with you across demanding terrain, while full-length side zippers let you slip them on or off without removing boots—a game-changer when conditions shift fast. A Velcro-adjustable hem and concealed snap fly offer a secure, customizable fit, and a zippered leg pocket keeps essentials dry and close at hand.

But it’s not just what these pants do—it’s how they’re made. The Alto Light HS Pants feature solution-dyed fabric, reducing chemical, water, and energy use for a significantly lower environmental impact. Pair that with PFC-free DWR, recycled polyester, and bluesign® certification, and you’ve got sustainability built into every seam.

Features:

• Ultralight and packable for fast-and-light missions

• Waterproof and windproof (15,000 mm) for serious weather protection

• Stretch fabric for comfort and mobility during active use

• Full-length side zippers for easy layering over boots and base layers

• Velcro-adjustable hems ensure a snug seal against wind and rain

• Eco-conscious design with solution dye, PFC-free DWR, and recycled materials

• Fair Wear certified for ethical production

Technical Specs:

• Fit: Regular

• Weight: Minimal (not listed, but ultralight classification)

• Main material: 50Dx50D recycled polyester

• Water column: 15,000 mm

• Laminate: 2.5L Mammut DRY Tour

• Sustainability: bluesign® PRODUCT, PFC-free DWR, Fair Wear, recycled, solution dyed