L4 Proprius Soft Shell Trousers | The North Face
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L4 Proprius Soft Shell Trousers

Lightweight durability and freedom of movement for ski mountaineering.




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Free delivery & returns

Standard delivery (Free): 2-4 working days
Express delivery (9,95€): 1-2 working days

Returns are free of charge. If you are not happy with your purchase for any reason, we will gladly accept your return within 30 days.

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Made for high-output ski mountaineering missions, our L4 Proprius Soft Shell Trousers are lightweight, durable, and supportive. Four-way stretch fabric and articulated knees provide exceptional range of motion as you climb to the summit and carve your way back down, while WindWall™ technology protects you from howling wind as you go. Side zips featuring a stretch-panel gusset and dual-snap ankle closure make it easy to use ski-touring boots. For added durability, there are Keprotec®- reinforced kick patches to deflect your crampons. Part of the Summit Series™ collection - the world’s finest alpine equipment.



Reduces wind chill for comfortable, flexible activity.


  • Durable double-weave fabric with four-way stretch
  • Low-profile waistband with integrated adjustable belt
  • Fully functional zip-fly with snap closure
  • Articulated knees for improved range of motion
  • 10" side-vent zips
  • Secure-zip thigh pocket with beacon loop
  • 8" side zips feature a stretch-panel gusset and dual-snap closure at the ankle, making it easy to use with ski-touring boots
  • Keprotec®-reinforced kick patches for added durability

Product Specifications