Eigerjoch IN Flex Pants Unisex

Elasticated insulated pants for mountain tours

Insulation pants for expeditions and extreme mountain tours at freezing altitudes: the Eigerjoch IN Flex Pants. The extremely light and elasticated Pertex® Quantum Air outer material is water-repellent. Stretch insulation ensures that the pants offer a perfect combination of freedom of movement and heat retention. Can be worn over hardshell and softshell pants. The full-length zipper makes putting on/taking off easier.

  • Mountaineering, Ski Touring

  • 1022-01160

  • Denier (main material)


  • Weight

    382 g

  • Cut

    Athletic Fit

  • Leg zipper pocket
  • Gusset crotch for greater freedom of movement
  • Elastic waistband on pants for perfect fit
  • Concealed fly with snap button
  • Hem and leg width can be adjusted using snap buttons
  • Unisex style
  • Full-length side zippers for putting on or taking off quickly
  • Pants stowable in leg pocket
  • Light, elasticated and water-repellent Pertex® Quantum Air outer material
  • Filled with 60 g/m2 Ajungilak® OTI™ stretch insulation for optimum heat retention and enhanced freedom of movement
  • Pertex® Quantum® Air

    Pertex® Quantum Air was designed to increase air permeability, striking a balance between windproof rating and breathability.

  • Filling

    100% Polyester

  • Insert

    85% Polyamide, 15% Spandex

  • Lining

    100% Polyamide

  • Main material

    100% Polyamide

  • bluesign® PRODUCT

    The bluesign® SYSTEM is a solution for sustainable textile production that eliminates the use of harmful substances. bluesign® PRODUCTS guarantee a responsible use of resources with a minimum impact on people and the environment.

  • PFC-free durable water repellent (DWR)

    Perfluorinated compounds (PFCs) are often used for waterproofing but are practically non-biodegradable. Mammut is committed to replacing non-biodegradable fabric treatments with more sustainable high-performance alternatives.

  • Fair Wear

    Fair Wear works to ensure fair and safe working conditions in garment factories. The non-profit engages directly with factories, trade unions, NGOs and governments to protect workers’ rights.

  • Recycled

    This product contains recycled materials with uncompromised performance and functionality. Choosing recycled materials reduces the use of virgin resources and helps promote a more circular economy.

  • Do not use chlorine-based bleach

    Do not use chlorine-based bleach

  • Do not dry clean or use solvents to remove stains

    Do not dry clean or use solvents to remove stains

  • Do not iron or treat with steam

    Do not iron or treat with steam

  • Do not pierce with needles

  • Tumble dry gentle

    Tumble dry gentle

  • Machine wash on normal cycle (max. 30° C)

    Machine wash on normal cycle (max. 30° C)

Man climbing.


Robust. Elastic. Breathable. The Eiger Extreme collection offers athletes uncompromising protection when venturing out in the most severe conditions.

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