Choosing the right rain jacket is a critical decision for any outdoor enthusiast, balancing the core technologies of waterproofing, breathability, and durability against specific activities and budget. The jackets you've listed represent the full spectrum of what the market offers, and understanding the technology inside them is the key to finding your perfect shell.

The foundation of any rain jacket is its waterproof-breathable laminate. This engineered membrane blocks rain while allowing sweat vapor to escape. High-performance jackets often use 3-layer (3L) constructions, where the laminate is bonded to both an outer fabric and an inner scrim, offering the best balance of durability and long-term performance.

For demanding alpine conditions and hill walking where exposure to relentless wind and rain is likely, the Rab Namche GTX Jacket is a premier choice. It utilizes a robust GORE-TEX laminate, renowned for its guaranteed waterproofing (with a hydrostatic head often exceeding 28,000mm) and excellent breathability. This makes it a bombproof option for those who need maximum protection in unpredictable mountain environments. Similarly, the Outdoor Research Foray 3L Jacket employs a 3L AscentShell™ membrane, which is specifically engineered for high breathability during aerobic activities. A key feature of the Foray is its versatile full-length side zip, which offers superior ventilation when you need to dump heat quickly on a strenuous climb.

For all-around hiking and backpacking, models like the Patagonia Granite Crest and the Patagonia Torrentshell 3L offer fantastic performance. Both use Patagonia’s proprietary 3L H2No® Performance Standard laminate, which provides reliable waterproofing (typically with a water column well over 20,000mm) and solid breathability. The Granite Crest often includes more premium features like a helmet-compatible hood and a focus on recycled materials, while the Torrentshell remains a benchmark for value and dependable protection for day hikes and general travel.

When weight and packability are the top priorities, 2.5-layer constructions excel. The Rab Downpour Light Jacket uses a Proflex™ laminate, still offering a solid 20,000mm water column but in a lighter, more packable package ideal for fast-and-light day hikes and scrambles where the jacket will spend much of its time in your pack. The The North Face Alta Vista Jacket follows a similar philosophy with its DRYVENT™ 2.5-layer membrane, a fully waterproof and durable coating that is highly effective for general hiking and urban use where low bulk is a priority.

Your final choice should be guided by your primary activity. For maximum protection in the mountains, the Rab Namche GTX is a top contender. For breathability on high-output trails, the Outdoor Research Foray 3L is exceptional. For the best balance of cost and performance for most hikers, the Patagonia Torrentshell 3L is hard to beat, while the Rab Downpour Light offers a fantastic lightweight alternative. By matching the jacket's core technology to your environment and exertion level, you can stay dry and comfortable on any adventure.