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Trailbreaker II Pants

trail, travel, and backpacking

Expert reviewed

Topic summary

trail, travel, and backpacking

Key takeaways

  • Hybrid-mapped fabric for zonal performance
  • Stretch-woven panels on front and seat
  • Breathable softshell on back of legs
  • Integrated gaiter hooks and ankle zippers
  • Multiple zippered pockets for essentials
  • Reinforced scuff guards at instep

Intended uses

  • Ski touring
  • Winter hiking
  • Mountaineering
  • Cold weather backpacking

Verification notes

Evidence: expert reviewed. Last verified July 14, 2026.

Catalog photo
Real product photography — no AI-generated or placeholder imagery.

Editorial take

The Outdoor Research Trailbreaker II Pants are a perennial favorite for good reason, offering a thoughtful blend of protection and freedom for activities like ski touring, mountaineering, and cold-weather hiking. Their hybrid construction, featuring a durable, weather-resistant stretch-woven fabric on the front and a more breathable, moisture-wicking softshell on the back, is a smart design choice. This zonal mapping keeps the elements out where you're most exposed while allowing heat and sweat to escape where it builds up, a crucial factor when moving hard in variable conditions. This isn't a pant for hot summer days, but for anything from shoulder-season backpacking to full-on winter ascents below the treeline, they strike a commendable balance.

In the field, the Trailbreaker IIs perform consistently. The stretch in the fabric allows for a full range of motion, which is essential for high-stepping or skinning uphill. While not fully waterproof, the DWR treatment and tightly woven face fabric shed light snow and drizzle effectively, buying you time to find shelter or layer up. The integrated gaiter hooks and ankle zippers are practical details, ensuring a snug fit over boots and preventing snow intrusion. Pockets are well-placed and functional, accommodating essentials without adding bulk. Durability has proven solid; these pants hold up well to abrasions from rock and ice, showing minimal wear even after extended use.

Compared to lighter softshell pants, the Trailbreaker IIs offer significantly more warmth and weather protection without feeling overly bulky. They strike a sweet spot between a thin hiking pant and a full-on hardshell, making them a versatile workhorse for anyone who spends significant time in mountains during colder months. For their price point, they deliver excellent value and performance, making them a top pick for those needing a reliable, do-it-all cold-weather pant that can handle both the uphill grind and variable alpine conditions.

Best for

  • Ski touring
  • Winter hiking
  • Mountaineering
  • Cold weather backpacking

Not ideal for

  • Too warm for mild or hot conditions
  • Not fully waterproof, susceptible to heavy rain
  • Slightly heavier than minimalist softshell options
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Verified specifications

Country of manufacture
🇺🇸 United States
Key features
  • Hybrid-mapped fabric for zonal performance
  • Stretch-woven panels on front and seat
  • Breathable softshell on back of legs
  • Integrated gaiter hooks and ankle zippers
  • Multiple zippered pockets for essentials
  • Reinforced scuff guards at instep

Warranty and repair information: contact Outdoor Research directly for the most current terms. Outdoor Research support

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