How about very high-quality cold weather softshell pants of the US military? Perfect for winter hiking and other cold-weather adventures.
米軍実物 ORC PCU LEVEL5 Softshell Pant S個人装備 - ROASTERSCAPARAOCOM
Platatac Tac Dax v4 Combat Pants, MultiCam
Apparel
Beyond L5 Glacier Pants, Coyote Brown - Venture Surplus
The PCU Protective Combat Uniform: A Buyer's Guide and Clothing System History - ITS Tactical
Soft Shell Pants Archives - PNA Surplus
Lightweight, breathable and packable thermal insulation when hiking, hunting, fishing, or engaged in tactical or other tough winter activities.
Särmä TST L3 Loft Pants
Ontario Geardo: Beyond Clothing - PCU Level 5 Glacier Shock Softshell Jacket and Pants
Beyond L5 Glacier Pants, Coyote Brown - Venture Surplus