Outdoor Research Ferrosi Pants vs REI Co-op Trailmade Pants

Editorial Team
Last modified at May 29, 2026
Choosing between the Outdoor Research Ferrosi Pants and the REI Co-op Trailmade Pants comes down to a classic trade-off between premium mobility and rugged value. The Ferrosi is engineered for the active hiker who prioritizes freedom of movement and cooling airflow, utilizing a high-spandex blend that feels almost like technical pajamas on the trail. In contrast, the Trailmade focuses on being a reliable, no-frills workhorse that withstands brush and rough terrain at a significantly lower price point, though it sacrifices some of that elastic comfort. Both options are lightweight and packable, making them excellent choices for day hiking and backpacking, but they cater to slightly different priorities regarding fabric performance and long-term wear.

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Outdoor Research Ferrosi PantsREI Co-op Trailmade Pants
Ferrosi PantsTrailmade Pants
Material

86% nylon (46% recycled), 14% spandex

94% nylon, 6% spandex

Weight

12.7 oz

11.6 oz

Fit

Straight-leg, Athletic

Standard, Slightly Tapered

UPF Rating

50+

50+

Breathability

Ferrosi Pants

4.7/ 5.0

Trailmade Pants

4.0/ 5.0

For hikers tackling hot trails or engaging in high-exertion activities, breathability is the primary factor in staying comfortable and preventing overheating. A pant that excels here allows air to circulate freely, wicking moisture away quickly to keep the skin dry during strenuous climbs. The Outdoor Research Ferrosi Pants dominate this category with an ultra-thin, airy fabric that users consistently praise for handling heat and heavy exertion better than almost any competitor. While the REI Co-op Trailmade Pants offer solid ventilation through their lightweight quick-drying nylon, they lack the same level of airy openness found in the Ferrosi. For those who run hot or prioritize cooling above all else, the Ferrosi is the clear choice.

Durability

Ferrosi Pants

4.0/ 5.0

Trailmade Pants

4.5/ 5.0

Durability determines how well a pair of hiking pants will hold up against rocks, brush, and the abrasion of repeated use over multiple seasons. A durable pant resists snags and tears, ensuring that your gear remains functional even when the trail gets rough. The REI Co-op Trailmade Pants stand out as the more rugged option, with user feedback highlighting their surprising toughness and ability to withstand trail abuse despite their budget-friendly price. Conversely, the Outdoor Research Ferrosi Pants utilize a very thin fabric that, while comfortable, is prone to snagging and lacks the reinforced construction needed for heavy-duty scrambling or bushwhacking. If your hiking style involves frequent contact with rough terrain, the Trailmade offers superior longevity.

Weather Protection

Ferrosi Pants

3.8/ 5.0

Trailmade Pants

3.8/ 5.0

Weather protection in lightweight hiking pants generally refers to the ability to shed light wind and brief drizzle rather than providing full waterproofing for sustained storms. Both models feature DWR coatings that handle short-term exposure well, but neither is designed to keep you dry in prolonged wet or cold conditions. The Outdoor Research Ferrosi Pants can manage light wind and a quick shower, but their thin material means they offer minimal insulation or barrier against the elements. Similarly, the REI Co-op Trailmade Pants provide basic protection that is acceptable for fair-weather hiking and quick-drying scenarios. Since both pants perform similarly in shedding light moisture and neither offers significant thermal retention, they are effectively tied for general fair-weather use.

Mobility & Stretch

Ferrosi Pants

4.7/ 5.0

Trailmade Pants

4.0/ 5.0

Mobility and stretch are critical for hikers who need to take high steps, scramble over boulders, or move freely without fabric restriction. A pant with high elasticity moves with the body, preventing the binding or pulling that can occur with stiffer materials during dynamic movement. The Outdoor Research Ferrosi Pants are exceptional in this regard, featuring a high-spandex blend that provides a second-skin feel and allows for unrestricted scrambling and climbing. The REI Co-op Trailmade Pants, while comfortable for standard walking, have minimal stretch compared to the Ferrosi, which can limit range of motion during more aggressive hiking or high steps. For active hikers who need maximum freedom of movement, the Ferrosi is the superior performer.

Functionality & Storage

Ferrosi Pants

4.2/ 5.0

Trailmade Pants

4.1/ 5.0

Functionality and storage cover the practical features of a pant, such as pocket placement, zippers, and overall utility for carrying small trail essentials. Both models offer a practical, trail-ready feature set that includes secure pockets and a comfortable fit, though neither is overloaded with excessive gadgets. The Outdoor Research Ferrosi Pants provide a practical layout that supports active use, though storage is not the primary selling point of the design. The REI Co-op Trailmade Pants take a no-frills approach, offering enough utility for regular day hikes and backpacking without unnecessary complexity. Since both pants deliver a functional experience that meets the needs of most hikers without significant drawbacks, they are considered equal in this category.

Weight & Packability

Ferrosi Pants

4.5/ 5.0

Trailmade Pants

4.5/ 5.0

Weight and packability are essential for backpackers and travelers who need to minimize load or easily stow pants when the weather changes. A lighter pant reduces overall pack weight and is easier to compress into a small space, making it ideal for multi-day trips or travel. Both the Outdoor Research Ferrosi and the REI Co-op Trailmade Pants excel here, with the Ferrosi weighing in at 12.7 oz and the Trailmade slightly lighter at 11.6 oz. Despite the slight weight difference, both are highly packable and easy to wear in heat, making them excellent choices for minimizing bulk. Given that both options are lightweight and compress well, there is no significant advantage for either side in terms of portability.

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Conclusion & Final Verdict:

The choice between these two pants depends on your specific hiking style and budget. Choose the Outdoor Research Ferrosi Pants if you prioritize maximum breathability and stretch for hot-weather scrambling, high-exertion climbs, or technical approaches where feeling unrestricted is paramount. Choose the REI Co-op Trailmade Pants if you need a durable, budget-friendly workhorse for general day hiking and backpacking where resistance to brush and long-term wear is more important than premium elasticity. While the Ferrosi feels like technical pajamas, the Trailmade proves that you don't need to spend a premium to get reliable trail performance.

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