Outdoor Research Helium UL Pant vs Outdoor Research Foray 3L Rain Pants

Waterproofing is the most critical feature in rain pants—no matter how light or packable they are, if they leak, they fail. Both the Helium UL Pant and Foray 3L deliver exceptional protection, with fully taped seams and high-quality materials that keep you dry even in prolonged downpours. Buyers consistently report no issues with leaking on either model, and both use reliable waterproof zippers and construction. The Foray 3L edges ahead slightly with its Gore-Tex-inspired AscentShell Dry membrane and YKK AquaGuard zippers, which many users note cause water to roll off more effectively. But the Helium UL’s 100% sealed seams and nylon fabric still provide near-perfect protection, making this a virtual tie for most hikers who just need to stay dry.

Breathability determines whether you’ll feel clammy and overheated during uphill climbs or extended hikes, even when it’s raining. The Foray 3L clearly outperforms the Helium UL here, thanks to its 3-layer construction and side zippers that allow active ventilation—many users report being able to regulate temperature effectively even during strenuous activity. The Helium UL’s Pertex material is still praised for being surprisingly breathable for its weight, but it lacks the venting options and advanced membrane of the Foray, leading to more internal moisture buildup during intense exertion. If you hike hard in warm, wet conditions, the Foray’s superior breathability will keep you more comfortable and less sweaty.

Durability matters because rain pants often face abrasion from brush, rocks, and pack straps. The Helium UL Pant, built with 15D ripstop nylon, earns higher praise for resisting rips and tears, with users noting it’s stronger than previous versions and holds up well on rugged trails. The Foray 3L uses a lighter 40D recycled nylon with a stretchy construction that prioritizes mobility over toughness, and while still backed by Outdoor Research’s Infinite Guarantee, some users report snags or punctures on sharp terrain. If you frequently hike off-trail or in dense vegetation, the Helium UL’s slightly tougher fabric gives it a practical edge in long-term reliability.

Comfort on the trail isn’t just about soft fabric—it’s about freedom of movement, fit, and layering ability. The Foray 3L dominates here with articulated knees, a gusseted crotch, and a looser fit that allows easy layering over base layers or insulation without restriction. Users consistently note its non-restrictive movement and roominess, making it ideal for long days and variable conditions. The Helium UL, by contrast, has a slim, snug fit that can feel tight on larger builds or when wearing thicker layers, and while some find it comfortable, others report needing to size up. If mobility and ease of movement are priorities, the Foray 3L is the clear winner.

Packability determines how easily you can carry rain pants without adding bulk to your pack—critical for hikers who need to stash them until needed. Both pants are designed to compress into their own back pocket, and users of both models rave about how small and light they become when packed. The Helium UL, at just 5.75 oz, is significantly lighter and packs down slightly smaller, with many noting it can 'almost disappear in your hand.' The Foray 3L, while heavier at 13.58 oz, still compresses well and fits neatly into a pack. For ultralight backpackers, the Helium UL has a slight edge, but for most hikers, both are impressively compact and easy to carry.

Ease of use affects how quickly and conveniently you can put on or take off your rain pants when the weather changes. The Foray 3L shines with its three-quarter side zippers, allowing you to slip them on over boots without removing your shoes—a huge advantage in muddy or wet conditions. Combined with an adjustable drawcord waist, it’s fast, intuitive, and practical. The Helium UL, by contrast, has no side zippers, making it difficult to get on over boots, and users report struggling to pull their feet through. It also lacks external pockets, limiting access to essentials. If you value speed and convenience during sudden rain showers, the Foray 3L’s design is far more user-friendly.