Lightweight fully waterproof rain jackets

(Best overall)

Patagonia Torrentshell 3L Jacket

$189

About 14 oz / 400 g

My top recommendation for most people. Its three-layer waterproof construction, fully taped seams, pit zips, and adjustable hood make it a strong choice for sustained rain without paying luxury prices.www.outdoorgearlab.com+3

Best for: everyday use, travel, hiking and heavy rain.

Shop at REI

Arc'teryx Beta SL Jacket

$500

About 12 oz / 340 g, depending on size

The premium lightweight option. GORE-TEX waterproofing, a technical fit and ventilation make it attractive when you want serious rain protection with less bulk.www.treelinereview.com+1

Best for: frequent hiking, mountain weather and lower weight.

Shop at REI

Outdoor Research Foray 3L Jacket

$250–260

About 15 oz / 435 g

A strong choice for prolonged downpours, especially if you tend to overheat. Its waterproof three-layer fabric and extensive side-venting zippers help release heat during activity.www.outdoorgearlab.com+3

Best for: wet climates, active hiking and ventilation.

Shop at Backcountry

Which one would I buy?

For the best balance of waterproof reliability, weight, durability and price, I'd buy the Patagonia Torrentshell 3L. Independent gear testers also rate it highly for overall performance.www.outdoorgearlab.com+3

One important caveat: if you mean extremely lightweight—under 7 ounces—the trade-offs become more significant. Ultralight shells can be genuinely waterproof, but may offer less durability, fewer pockets and less ventilation.

One question so I can narrow it down: What will you mainly use it for?

1. Main use

Everyday wear and travel

Hiking or backpacking

Walking or commuting in prolonged rain

Running or cycling

2. Weight preference

As light and packable as possible

Lightweight but durable enough for years of use

3. Budget

Under $100

Under $200

$200–350

Any budget for the best option

[Find my best jacket]

$110.47

Outdoor Research Foray 3L Jacket

$259.95

Patagonia Boulder Fork Rain Jacket

$239.00

• Arc'teryx Beta SL — 12 oz / 340 g, 3L GORE-TEX ePE, 28,000 mm waterproof rating, and pit zips. This is a particularly compelling option if you want very high storm protection without moving into heavy alpine-shell territory.www.treelinereview.com+1
• Patagonia Torrentshell 3L — about 14 oz / 400 g, 3L H2No, pit zips, and substantially cheaper than the Beta SL. A good choice if durability and sustained rain matter more than shaving every ounce.www.treelinereview.com+1
• Outdoor Research Helium — roughly 6 oz / 170 g, making it dramatically lighter. It's fully seam-taped and uses 2.5L Pertex Shield; excellent as a packable emergency shell, although it sacrifices ventilation and some durability for the weight.www.treelinereview.com+1
• Outdoor Research Foray 3L — a heavier-duty 3L option with excellent ventilation via its long TorsoFlo side zips. Particularly interesting if you run hot while hiking.
• Patagonia Boulder Fork — a 3L H2No shell using relatively light 30D fabric; a nice middle ground between ultralight and full-featured technical shells.

If you want really ultralight

The Montbell Versalite is worth a look: around 5.9 oz / 167 g, 3-layer DRYTEC, 20,000+ mm waterproofing, and pit zips. It's one of the more impressive weight-to-protection combinations currently available.www.treelinereview.com+1

My practical cutoff: if you're expecting hours of hard rain, I'd favor a 3L shell around 10–14 oz rather than chasing a sub-7-oz jacket. If it's primarily an emergency layer that lives in your backpack, the ultralight 2.5L options make much more sense.discovertrailcraft.com

If you tell me your budget and intended use (hiking, commuting, running, backpacking, etc.), I can narrow this to 2–3 specific models.