Evolved: The Shift from 2.5- to 3-Layer Rain Jackets
Nov 20, 2024
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We’ve tracked the waterproof jacket market closely over the last decade and noticed an interesting change in the past few years: Big players like Arc’teryx and Patagonia have discontinued all of their 2.5-layer rain shells, replacing them exclusively with 3-layer jackets. Recently, the Outdoor Research Foray—a popular rain jacket that has long featured 2.5-layer construction—was updated to a (you guessed it) 3-layer design. When major brands all move in the same direction, our interest is piqued. What’s going on with this shift from 2.5- to 3-layer rain jackets?
In short, manufacturers are reckoning with the inherent downsides of 2.5-layer construction (namely, durability and comfort) while simultaneously cracking the code on the lightweight yet affordable 3-layer rain shell. The result is a rain jacket market that looks wildly different than it did just five years ago. Below, we break down the details of this movement.
The 2.5-layer shell is the most lightweight and packable solution to waterproof-breathable outerwear, and it’s historically been at the mid-to-premium end of the rain jacket market. In contrast to the more stereotypically rigid and crinkly nature of a 3-layer shell, 2.5-layer shells are flexible, quiet, and generally discernibly lighter and more affordable. Gore-Tex’s Paclite and Paclite Plus are two of the most sought-after 2.5-layer membranes, but there are several other options, including Pertex Shield and in-house efforts like Black Diamond’s BD.Dry and Marmot’s NanoPro.
A 2.5-layer shell includes a waterproof fabric made up of a nylon or polyester face fabric (layer #1), a waterproof-breathable membrane (layer #2), and abrasion-resistant “treatment” on the inside of the membrane (layer #0.5), which functions to provide a palatable next-to-skin feel and protect the membrane from dirt, abrasion, sunscreen, body oil, and more. This treatment can be sprayed on, printed on, laminated on, etc.—the key is that it’s a coating rather than an affixed piece of fabric (which we see in 3-layer construction). This lightweight liner is the primary reason why 2.5-layer jackets are low in weight and high in flexibility.
The primary shortcoming of a 2.5-layer shell is the coated liner’s durability. The cheapest 2.5-layer jackets are prone to complete delamination, while even premium designs (like Gore-Tex Paclite) have been known to flake off over time. Once the liner is compromised, the fragile waterproof-breathable membrane is exposed—and it’s all downhill from there in terms of protection. With normal use, most 2.5-layer jackets will start degrading after two to three years. In a market increasingly focused on sustainability, this short lifespan sticks out like a sore thumb.
Second, 2.5-layer shells fall short in next-to-skin comfort and moisture-wicking. Most are guilty of feeling fairly plasticky on the interior, and with little ability to wick moisture off the skin (the coating is generally not absorbent), they can grow clammy as you sweat. Some 2.5-layer liners breathe better than others—Gore-Tex’s Paclite Plus, for example, has raised dots that increase ventilation between the jacket and the body—but they’re overall less soft and moisture-wicking than fabric liners of 3-layer shells.
For high-end companies like Patagonia and Arc’teryx, these downsides became enough reason to eliminate 2.5-layer shells from their lineups. But what has stepped in to take their place in the ever-popular rain jacket category? The solution is 3-layer construction, but in an avant-garde form.
Three-layer shells have historically been relegated to the hardshell category: They’re often thick, rigid, crinkly, and generally heavier and less packable than rain jackets. This construction offers the protection you want while backcountry skiing in a winter storm or climbing Mt. Rainier, but it’s not ideal for an everyday rain jacket or lightweight hiking shell. What’s more, 3-layer shells have historically been quite a bit pricier than 2.5-layer jackets.
But this is all changing. Now, we’re seeing several 3-layer shells dubbed as rain jackets. These jackets are generally $250 or less, use in-house membranes (read: not Gore-Tex) that have a bit of give, and feature fairly casual designs, including non-helmet-compatible hoods, hand pockets at the hem, relaxed fits, and more. The Patagonia Torrentshell 3L ($179) leads the charge, but the list goes on, including the new Outdoor Research Foray ($249), the Mountain Hardwear Threshold ($180), and The North Face’s Terrain Vista 3L Pro ($200). These jackets aren’t as lightweight or flexible as 2.5-layer shells, but they offer more comfort, moisture-wicking, and durability for around the same price.
If you’re looking to shave weight or don’t want to compromise on the airy, flexible feel we’ve come to expect from rain jackets, there’s still an argument for the 2.5-layer shell. For example, the Black Diamond Fineline Stretch (read our Fineline Stretch review) checks in almost 3 ounces lighter than the Patagonia Torrentshell 3L (11.3 vs. 14.1 oz.), packs up smaller, and has a much more easy-moving feel. Put together, it’s arguably the better jacket for backpacking, bikepacking, and other objectives that reward a streamlined kit and require high freedom of movement. And if savings is your priority, you won’t find a 3-layer shell for cheaper than about $179, while many 2.5-layer shells check in as low as $100 (for the REI Co-op Rainier, for example).
Will these 2.5-layer shells last longer than the 3-layer alternatives? No. Will they wick moisture as well or be as soft next to the skin? No, not that either. But will they provide that traditional rain jacket feel for equal or less than most 3-layer rain jackets? Yes indeed.
There are a few different scenarios in which you’ll need a rain jacket. The first is for use around town, especially if you live in wet areas like the Pacific Northwest or Northeast. In this scenario, weight and packability matter very little, and you’ll want to prioritize a jacket that will hold up to everyday wear. This is where a 3-layer rain jacket makes the most sense: It’s styled for daily use (unlike many hardshells), has a comfortable next-to-skin feel, and offers the durability and protection of a hardshell for significantly less. For everyday use, we’re big fans of jackets like the Patagonia Torrentshell 3L, Mountain Hardwear Threshold, and The North Face Terrain Vista 3L Pro.
The second use case for a rain jacket is for wet-weather protection during outdoor activities, whether you’re hiking, biking, boating, etc. Here, you’ll have to use more discernment to make your choice. If you’re headed out for multiple days at a time and prioritizing ultralight gear, the answer is likely a 2.5-layer rain jacket—they’re simply the more lightweight and packable choice (the Black Diamond Fineline is a great example). They’re also the best bet for those who want ample range of motion without that rigid, crinkly feel. But if you’re willing to sacrifice a few ounces, a 3-layer rain jacket offers enough freedom of movement for most activities and wicks moisture better. Plus, you won’t have to replace it in just a few years. In terms of value, 3-layer rain jackets are the clear winner.
Looking for details on specific 2-, 2.5-, and 3-layer rain jackets? We’ve spent countless hours testing rain jackets across all categories and have compiled all our findings into our article on the best rain jackets. As you research, use our handy sort and filter function and peruse our detailed sustainability boxes for each product.
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