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Mammut Masao Jacket

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Mammut Masao Jacket

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The Mammut Masao Jacket will meet all of your alpine and inclement weather protection needs. Whether you're in the backcountry or downtown Seattle, when a storm is rolling in fast, you're going to need protection from the elements. The Masao has got you covered with slightly stretchy hardshell outer material that offers premium waterproofing. 15K Breathability and underarm zippers help you to regulate temperature so you can stay extra dry. With its harness/backpack compatibility, we really can't think of a reason not to get the Mammut Masao Jacket.
Face Fabric
DRYtech™ Premium 3-Layer Stretch 18301 - Firm, matte surface, Bluesign® approved fabric. One hundred percent reliable protection against wind, snow and rain with even better breathability. For mountaineers who need total confidence in their clothing.
100% Polyester
100% Polyurethane
Lining Material
100% Polymide
Drawcord hem, adjustable using one hand
Pre-shaped sleeves with Velcro cuffs
Two backpack and climbing harness compatible zippered pockets
One elastic mesh inside pocket with zip
One multimedia pocket with cable outlet
One inside pocket with zip
Underarm ventilation with spray proof 2-way zip
Additional Features
Vertically and horizontally adjustable, helmet-compatible hood


  • Fit: Slim
    This is a streamlined fit to provide a wide range of motion and a minimalist look. Jackets fit close to body, with a more tailored or fitted profile. Pants have a slimmer thigh and knee, and typically won’t go much below the ankle when standing straight.
  • Length: Waist-length
  • Material: Polyamide, Polyester, Polyurethane (PU)
  • Waterproof Rating: 20000mm
  • Breathability: 15000g
  • Insulation: No Insulation
  • Seam Sealing: Fully Taped
  • Powder Skirt: No
  • Hood Type: Fixed Hood
  • Warranty: Limited Lifetime
Weight (g) 570
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Mammut products can only be shipped within the U.S.