Quick verdict
Arc'teryx Gamma Hoody: 4.5/5
A four-way-stretch softshell that breathes hard and moves with you, built for cold, dry, active days where a hardshell would leave you clammy. Not a waterproof, and not trying to be.
- Best for: Cold, dry, high-output days (~£280)
- Fabric: Four-way stretch woven softshell with DWR (Sheds showers, not downpours)
- Pair it with: A packable waterproof shell (For when the sky opens)
The full review is below.
The Arc'teryx Gamma Hoody is the most misunderstood jacket in the entire Arc'teryx range, and almost every unhappy owner made the same mistake before they bought it. They saw the price, saw the Arc'teryx name, saw a hood and a technical-looking fabric, and assumed they were buying a waterproof. They were not. The Gamma is a softshell, and a softshell is a completely different tool from a waterproof shell.
Get that one distinction right and the Gamma is one of the nicest jackets you can own for UK hill days. Get it wrong and you will end up cold, wet and cross on a ridge somewhere, wondering why your expensive Arc'teryx let the rain straight through. So before anything else, this review exists to make one thing crystal clear: the Gamma Hoody is not a waterproof, and it was never designed to be.
The verdict up front
The Gamma Hoody (~£280) is a four-way-stretch woven softshell using Arc'teryx's Wee Burley fabric with a durable water repellent (DWR) finish. That finish sheds light showers and shakes snow straight off the surface, but the jacket will wet out in sustained rain. It is not a hardshell and it will not keep you dry in a real downpour.
What it does instead is breathe brilliantly and move with you, and that combination makes it a superb jacket for cold, dry, active days: crisp winter hill walks, high-output climbs, fast walking on cold mornings, anything where a hardshell would leave you clammy and boil-in-the-bag. Think of it as the jacket you reach for when it is cold and nasty but not actually raining. Buy it for that job, carry a packable waterproof alongside it for when the weather turns, and you will love it. Buy it expecting a shell and you will be disappointed. It earns its 4.5 rating as a softshell, not as a substitute for one.
Buy the Arc'teryx Gamma at Tiso
Softshell vs waterproof: read this first
This is the section that matters more than any other, so here it is plainly.
A waterproof (a hardshell, like the Arc'teryx Beta) has a waterproof membrane bonded inside it. Water cannot pass through that membrane, full-stop, so in sustained rain you stay dry. The trade is breathability: even the best membranes move moisture more slowly than open fabric, so working hard in a hardshell on a dry, cold day can leave you damp with sweat from the inside.
A softshell like the Gamma has no waterproof membrane at all. It is a tightly woven stretch fabric with a DWR coating on the outside. That coating makes water bead and roll off, which handles a passing shower or dry, powdery snow without a problem. But there is nothing stopping water once the surface saturates. In steady or heavy rain the fabric wets through, the DWR gives up, and you get wet. That is not a fault. It is simply what a softshell is.
So the two jackets are not competitors, they are different tools:
- If the defining problem is rain, you want a waterproof.
- If the defining problem is staying comfortable while working hard in cold, dry or lightly showery conditions, you want the Gamma.
The reason this trips people up is the price and the badge. Nobody expects a ~£280 Arc'teryx jacket to let rain in, but that expectation is about the price tag, not the technology. The Gamma is expensive because it is a beautifully made softshell, not because it is a secret waterproof. If it is rain protection you are after, that is a different jacket entirely, and our Beta comparison and our best waterproof jackets guide are the pieces to read instead.
What the Gamma is great at
Once you stop asking the Gamma to be a waterproof, its strengths are obvious.
It breathes. With no membrane fighting your body heat, warm damp air moves straight out through the weave. On a hard climb in cold air you stay dry from the inside, which is exactly where a hardshell struggles. This is the single biggest reason to own a softshell.
It moves with you. The four-way-stretch fabric flexes in every direction, so there is no fighting the jacket when you reach, scramble or high-step. It feels more like a heavy stretch top than a technical shell, and after a full day that freedom of movement matters.
It shrugs off the light stuff. The DWR finish sheds showers and snow, so for the cold-and-dry British hill day, spitting sleet and blowing snow included, the Gamma keeps the weather off without ever making you clammy. It is only sustained rain that defeats it.
It handles wind and cold air well. The dense weave takes the bite out of the wind far better than a fleece, and the fabric has enough substance to feel warm and protective in cold, dry conditions on its own over a baselayer.
That is the sweet spot: cold, dry, active, breezy, maybe a bit of snow or a passing shower. Crisp winter walks on the South Downs, high-output ascents, cold mornings that warm up. Exactly the days a hardshell over-heats you.
Fit and features
The Gamma Hoody is cut as a trim, athletic layer meant to go over a baselayer or a thin fleece, not over bulky insulation. That trim fit is deliberate: a softshell works best worn close, where its stretch and breathability do their job. Size up only if you plan to layer a thicker midlayer underneath.
The standout feature is the helmet-compatible hood. It is sized and adjustable enough to fit over a climbing or ski helmet, and it cinches down neatly to sit over a bare head or a hat without flapping. For a jacket aimed at active mountain use, that hood is a proper feature rather than an afterthought.
Elsewhere it is clean and functional: articulated sleeves that stay put when you lift your arms, a hem adjustment to seal out draughts, zipped hand pockets, and low-bulk cuffs that sit under gloves. Nothing is over-built, which keeps the weight sensible and the jacket packable enough to carry when you are not wearing it, though it is bulkier folded than a thin windshell like the Squamish.
Pros and cons
- Breathes far better than any hardshell, so no clammy sweat-out on hard, cold efforts
- Four-way stretch fabric moves with you and never fights your reach
- DWR sheds light showers and shakes off dry snow with ease
- Excellent helmet-compatible hood for climbing and winter use
- Trim, articulated cut and clean features that suit active days
- Cuts the wind far better than a fleece over a baselayer
- Not waterproof: it will wet out in sustained or heavy rain
- You still need to carry a packable waterproof for real weather
- Trim fit leaves little room for a thick midlayer underneath
- Softshell price sits close to some full waterproof shells
Who it is for
The Gamma Hoody is for the cold-but-dry, high-output walker and climber: someone who runs warm when moving, hates the clammy feel of a hardshell on a working climb, and does most of their walking in cold, dry or lightly showery conditions rather than steady rain. It is the ideal jacket for crisp winter hill days, fast ascents and snowy-but-dry mountain outings, worn with a packable waterproof kept in the pack for when the weather turns. It is not the jacket for anyone whose main enemy is rain, and it should never be your only outer layer on the UK hills.
