MEC Alpine Ally Jacket - Men's 5042-392

MEC Alpine Ally Jacket - Men's

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Show Description

A minimalist shell that packs down small to fit in a travel bag or an alpine pack. In coastal climates or fast-changing mountain weather, it offers protection from storms and persistent rain. The design features deep pockets where you can stash accessories, and a hood that adjusts for coverage, mobility and a clear view of the way ahead. MEC chose Pertex Shield + for the Alpine Ally, as it presents both reliable outdoor performance and accessible value. With a versatile cut, you can use this jacket for climbing, hiking and skiing, or any outing when mixed weather is in the forecast.

  • 3-layer Pertex Shield + is treated to shed water and taped through the seams for full waterproof protection.
  • Clean, stitch-free construction is light and offers unrestricted movement.
  • Helmet compatible hood has 3-way adjustments (left, right and front to back).
  • Chin guard prevents chafing.
  • Underarm zips provide venting options.
  • Front zipper is backed with a storm flap.
  • Pocket zippers are very water resistant, but not waterproof, so we don't recommend them for electronics or other valuables.
  • Hook-and-loop cuff tabs.
  • Articulated elbows for easy movement and for reaching high.
  • Left and right toggles adjust the hem.

Tech specs

Show Tech specs
  • 400g (Small)
  • 406g (Medium)
Ideal for
  • Alpine climbing and mountaineering
  • Backcountry skiing
  • Camping and hiking
Type Waterproof-breathable
Technology Pertex Shield +
Construction 3-layer
Face fabric 40-denier nylon
Lining/backer Nylon
Fabric waterproof rating

The standard test for waterproof fabrics uses a standing column filled with water. The figures given are the water column height. A rating of 3,500mm or higher can be considered waterproof. The higher the rating, the more durable the waterproof fabric will be over time.


Waterproof garments use waterproof-breathable technologies and are fully seam-taped. Water-resistant garments use waterproof-breathable technologies but their seams are not taped. Water-resistant garments repel water and protect against wind but are not made of waterproof fabric.

Waterproof with fully taped seams
Fabric active breathability

The rate at which a waterproof breathable fabric expels moisture when the inner surface is moist from perspiration. Values under 8,000g/m2/24h provide low performance, 20,000g/m2/24h provide moderate performance and values over 30,000g/m2/24h provide high performance.

Venting Underarm zips
  • 2 handwarmer
  • 1 internal zippered

A windproof garment does not allow any air to permeate the fabric. A garment with windproof panels has panels of fabric that are totally windproof, but the rest of the garment may not be windproof. A wind-resistant garment resists some wind, but not as much as a garment that is windproof.

Length Below hip
Durable water repellency

Usually referred to as DWR. A treatment made to fabrics that causes water to bead and run off instead of soaking through.

Additional feature(s) Wind flap behind zipper
Made in China