When the weather shifts fast on technical terrain, the Firewall Mountain Jacket is our pick for trail runners and alpinists who can't afford bulk. Softshell-style construction stretches and breathes under hard effort while shedding wind and light weather. The trim athletic fit layers cleanly without restricting movement.

• Wind and weather resistant build handles variable mountain conditions without trapping heat during high-output efforts
• Softshell-style fabric delivers four-way stretch and active breathability — moves with you instead of fighting you
• Trim athletic fit sits close without binding, layers cleanly over a base layer or light mid for flexible protection
• Built for trail running, fast hiking, and alpine approaches where pack weight and mobility are non-negotiable
• Available in black — one versatile colorway that works from the trailhead to the summit and doesn't show the grime