Mammut Aenergy IN Hybrid Pants

Polartec Alpha Direct Insulation 95g/sqm
Weighs 306g (Medium size)
Code: AW18268
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Active insulation in a pair of pants, it's that simple. These are the future for anyone in need of pants that work as hard as you do in colder conditions in the hills and mountains. Polartec Alpha Direct lining makes these soft, comfortable and warm but more importantly amazingly effective at regulating heat.   

Mammut says:

Ice and rock: conquer the mountain world with the Aenergy IN Hybrid Pants Men. The pants stand out with their very breathable Polartec® Alpha® direct insulation material combined with vapor-permeable, wind- and water-repellent Pertex® Quantum Air outer material on areas exposed to wind and cold.

The lining-free Polartec® Alpha® Direct offers heat retention without heat build-up. You are ready to face the mountain thanks to the climbing harness-compatible front pockets and the edge and crampon protection in robust Cordura® material.

Mammut's Aenergy IN Hybrid Pants will turn into a must for anyone heading outdoors in colder weather. The Polartec Alpha Direct insulation is really soft and comfortable but also gives you a decent level of warm. However, it works best when you're active as it breathes well and wicks amazingly so your temperature is regulated as you go. There are a couple of vents you can zip open or closed depending on the conditions too.

There are a couple of good sized pockets with secure zips, reinforced areas at the bottom of the legs to increase durability and plenty of other little features to increase comfort and improve the usability. These are without doubt my favourite pants for colder weather and they have had plenty of use and are still in perfect condition.

- Reviewed by Ultralight Outdoor Gear

  • Very breathable Polartec Alpha Direct insulation material (95g) combined with vapor-permeable, wind and water repellent Pertex Quantum Air outer material on areas exposed to wind and cold
  • Lining free Polartec Alpha Direct offers heat retention without heat nuild-up
  • Lightweight, breathable, elastic 3 layer soft shell material on backs of knees, crotch and bottom of legs for additional freedom of movement and weather protection
  • Elastic waistband with drawstring
  • 2 climbing harness compatible front pockets with zippers
  • side ventilation with zipper and mesh-lined snow protection
  • Edge and crampon protection made from durable Cordura material
  • Leg hem with gusset, zipper and anti-slip webbing
  • 30" waist weighs: 294g
  • 32" waist weighs: 306g
  • 34" waist weighs: 316g
  • 36" waist weighs: 326g
  • Regular fit


  • Main fabric: Pertex Quantum Air / 100% Polyamide
  • Polyester Polyurethane Elastane Woven with PU Membrane
  • 79% Polyester, 15% Polyurethane, 6% Elastane
  • Filling: Polartec Alpha Direct / 100% Polyester
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