Patagonia Triolet Review: The Serious Gore-Tex Mountain Shell

The Patagonia Triolet is the jacket you reach the Torrentshell's ceiling and then keep going. It is Patagonia's proper mountaineering shell: a burly three-layer Gore-Tex hardshell built for the sort of conditions where the weather is genuinely trying to hurt you: a wild, exposed coastal hike with the wind driving rain sideways off the sea, Scottish winter, exposed high ground. It sits at the top of Patagonia's waterproof range, the same tier as a Rab Latok or an Arc'teryx Alpha, and it is very good.

Let me be honest up front, because it shapes who should read on: most UK hillwalkers do not need this jacket. The Torrentshell covers the vast majority of British hill days for a lot less money and weight. The Triolet is for the walker whose year includes genuinely wild, exposed days, an exposed coastal hike in a gale as much as a serious mountain or winter day, where a tougher, more featured shell earns its place. If that is you, read on. If it is not, save your money and your back and read our Patagonia Torrentshell review instead.

The short version

The Triolet is a serious 3-layer Gore-Tex mountaineering shell: fully waterproof, tough, and built with the features that matter when conditions are severe, a helmet-compatible hood, pit zips for dumping heat on a hard climb, and pockets that work with a harness and a pack. It is heavier and burlier than the Torrentshell, as a mountaineering shell should be. The RRP is around £370, but, and this is the part worth knowing, the colours are currently at very different sale prices, so the blue is around £296 and the red around £222 in XXL, which for a Gore-Tex shell of this quality is a genuine bargain.

What the Triolet actually is

The Triolet is built around a three-layer Gore-Tex construction, which is the tough, durable, single-fabric build used for serious mountain shells rather than the lighter 2.5-layer construction of packable jackets. That means full, reliable waterproofing that holds up to sustained, wind-driven rain and snow, and a fabric that survives being scraped against rock and buried under a pack all day.

The features are the mountaineering ones. The hood is helmet-compatible and properly adjustable, so it works over a climbing or ski helmet and moves with your head. The pit zips let you vent fast on a hard climb, which matters far more in the mountains than on a gentle hill. The pockets are positioned to stay usable with a climbing harness and a rucksack hip belt on. And the face fabric is a tough recycled nylon, made, as with the rest of the Patagonia range, in Fair Trade Certified factories and finished with a PFAS-free water repellent. It is a proper piece of technical kit, not a lifestyle jacket with a Gore-Tex label.

Triolet or Torrentshell: which do you need?

This is the decision that actually matters, so here it is plainly.

Buy the Torrentshell if you walk UK hills, coast paths and the occasional bigger day, and you want one reliable waterproof that is light, packable and sensibly priced. That is most people, and it is a brilliant jacket for the job.

Buy the Triolet if your walking regularly puts you in genuinely severe, exposed conditions: wild, wind-blasted coastal hikes with the rain coming in sideways, Scottish winter, scrambling and climbing, alpine days, prolonged exposure to driving wind and rain. The tougher fabric, the helmet hood, the pit zips and the harness-friendly design are worth real money on days like that, and pointless weight and cost on gentle ones.

In short: the Triolet is not a better Torrentshell, it is a different, more specialised tool. Match it to the conditions you actually walk in, not the ones you imagine.

The colours, and the bargain to know about

Here is where the Triolet gets genuinely interesting for a canny buyer. It is the same £370 jacket in every colour, but Tiso currently has the colours at very different sale prices, so which colour you can live with makes a real difference to what you pay. Prices below are correct at the time of writing and will move, so check before you buy.

Blue, around £296, all sizes. The value pick. A full size run in stock and the biggest saving on a current-colour Triolet. If blue works for you, this is the one to buy.

Grey, around £370, all sizes. The full-price current colour, in stock across the sizes. Buy this if grey is the one you want and the sale colours do not fit or appeal.

Red, around £222, XXL only. The outright bargain, if you happen to be an XXL. A £370 Gore-Tex mountaineering shell for £222 is a lot of jacket for the money, but it is the last size standing, so it only works if it is yours.

The moral: on a jacket like this, being flexible about colour can save you a hundred pounds or more. Decide what size and colours you can accept, then buy the cheapest that fits.

Fit and sizing

The Triolet has a mountaineering cut: room to layer properly underneath, including a fleece or a light insulated jacket, and a length and articulation designed for reaching, scrambling and climbing rather than for a slim town look. That is correct for the job. If you are between sizes and plan to wear it over serious winter layers, do not go too snug. It is built to go over your system, not to be worn on its own over a shirt.

Reasons to buy, reasons to pause

• Proper 3-layer Gore-Tex: fully waterproof and genuinely durable
• Real mountaineering features: helmet hood, pit zips, harness-friendly pockets
• Tough recycled face fabric, Fair Trade sewn, PFAS-free finish
• Backed by Patagonia's Ironclad Guarantee and repair service
• Currently a bargain in the sale colours, from around £222 to £296

• More shell than most UK hillwalkers need, the Torrentshell suits most people better
• Heavier and bulkier than a lighter hillwalking shell
• Full RRP of around £370 is a lot unless you catch a sale colour
• The cheapest colours are limited on size and stock

Verdict

The Patagonia Triolet is an excellent mountaineering shell, and if your walking genuinely takes you into wild, exposed conditions, a storm-battered coastline as much as a serious mountain or winter day, it is an easy jacket to recommend: tough, fully waterproof, properly featured and made to Patagonia's usual standards of durability and sourcing. It is the right tool when the Torrentshell is not enough.

The honest caveat is simply that most people do not need it, and buying it for gentle UK hill days means paying for weight, features and cost you will never use. Be truthful with yourself about the conditions you actually walk in. If they are serious enough to justify it, the Triolet is a fine choice, and with the sale colours running from around £222 to £296 against a £370 RRP, right now is an unusually good time to buy one. It scores a 4.6.

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