HikingMountain EquipmentDown Jacket
Mountain Equipment Lightline down jacket review: reliable, affordable warmth
An incredibly warm and durable down jacket that offers excellent value for money.
✓ Best BuyMountain Equipment Lightline
Weight750 gFill700-fill power downPrice£240 RRP
The good✓ Market-leading warmth at this price
✓ Exceptional value (often on sale <£200)
✓ Very durable 40-denier outer
✓ Excellent wind protection
✓ Detachable hood
✓ Two huge hand-warmer pockets
✓ Deep internal stash pocket
✓ Down Codex — ethically sourced insulation
The not-so-good✗ Heavy at 750g — not for fastpacking
✗ Less packable than pricier alternatives
Check price at Go Outdoors →
At a glance
| Brand | Mountain Equipment |
| Model | Lightline Down Jacket |
| Price | £240 RRP (often significantly less at Go Outdoors) |
| Weight | 750 g (approximately two cans of Coke) |
| Fill | 10.4 oz of 700-fill power duck down (Down Codex certified) |
| Shell | 40-denier water-resistant nylon, fully cover-stitched seams |
| Ideal for | Winter backpacking, wild camping, mountaineering |
| Not suitable for | Trail running, bikepacking, summer trips |
Overview
A staple of UK winter hillwalking, the Lightline has long been one of the most popular down jackets on the market. One of Mountain Equipment’s longest-running and most successful lines, it delivers outstanding warmth, is reasonably lightweight and packs down to a good size — and does all of this for a very reasonable price.
It is a heavy-duty overcoat built to keep you warm on the coldest winter days. A transportable duvet that you can throw on when the mercury plummets, it is not designed for high-output activities. But the Mountain Equipment Lightline offers exceptional warmth at a solid price — especially when picked up on offer at Go Outdoors, which it frequently is. Thanks to the 700-fill power duck down, it also compresses fairly well into the included stuff sack, and weighs about the same as two cans of Coke (750 g).
The jacket comes with a detachable hood, two huge hand-warmer pockets, and a deep internal stash pocket — ideal for keeping electronics warm or stashing a water bottle in sub-zero temperatures. The fit is well-considered: snug but not restrictive. Plenty of room for a thick base layer or jumper, but it still feels comfortable over just a t-shirt — close enough to trap warmth without feeling like you are swimming in feathers. The outer shell is made from a tough, 40-denier water-resistant nylon with fully cover-stitched seams to lock in warmth and keep out draughts.
Bought directly from Mountain Equipment, the RRP currently sits at £240 — already a very fair figure for the quality, warmth and durability on offer. But this jacket is almost always available for less. Shop around — especially at the end of the winter season — and you will often find it heavily discounted at Go Outdoors, where it frequently drops below £200, and occasionally even under £150. The Rab Neutrino Pro comes in at £325, and the Patagonia Fitz Roy tips the scales at £400 — and while both are lighter, more compressible and arguably more technical, we do not think the differences justify the significantly higher price tag for most people.
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How we tested
Every member of the GBAC team happens to be a long-time owner of a Lightline. We have all got one — bought at different points over the last seven years, long before the prospect of reviewing them was ever on the cards. Each of us picked it up for the same reason: we recognised that this jacket offered the best value for money in the deep-winter down jacket category. And we still love our Lightlines today. It also means we have racked up a serious amount of real-world experience with them — collectively spending thousands of hours inside these jackets, from breezy autumn strolls in the Shropshire Hills to full-on Highland mountaineering missions in the Cairngorms.
Features and performance
Warmth
The first thing to understand is that these jackets are not small. They pack down to about the same size as a 2- or 3-season sleeping bag — which is pretty bulky if you are trying to squeeze one into a winter backpacking setup already loaded with a four-season tent, sleeping bag and mat. At 750 g, they are not ultralight either. But for us, the Lightline is the jacket we reach for when temperatures drop well below zero — the kind of trips where comfort and safety matter more than shaving grams off your pack weight.
In terms of warmth, we have found the Lightline to be market-leading at this price point. It is properly warm. At around 0°C, it will keep you comfortable even with just a t-shirt underneath — and that is coming from someone who runs cold. Last winter, one of us sat out on top of West Mill Tor for several hours at –13°C wearing an Icebreaker merino base layer, a Patagonia Better Sweater, and a Patagonia Nano Puff — all under the Lightline. Not the most efficient layering system, but the warmth it delivered was still seriously impressive.
“Every member of the GBAC team owns one — bought independently, long before any thought of reviewing it. That says more than any spec sheet.”
Build quality
The zips on the Lightline are high quality and bombproof. No snags, no stiffness, and they come fitted with large toggles that are easy to operate with thick winter gloves. The hood and hem can both be cinched down using a glove-friendly elastic pulley system, and the Velcro cuffs sit neatly over or under gloves to help seal in heat. When new, the Lightline is also reasonably water-resistant. Sure, the DWR will wear over time, but the durable 40-denier outer fabric does a decent job of shedding light showers and holds its own in strong wind.
Importantly, all the insulation in the Lightline meets the highest ethical standards. Mountain Equipment’s Down Codex sets the benchmark for responsible sourcing, with full traceability and animal welfare at its core.
Buy the Mountain Equipment Lightline at Go Outdoors →
Our verdictOne of our favourite down jackets of all time. We love it — and we will long continue to do.Overall, we love the Mountain Equipment Lightline. Delivering incredible warmth at a very reasonable price, we rate its performance across a wide range of conditions and trust it to keep us warm on the coldest British winter days. We are also big fans of the fit — close enough to wear over a base layer without feeling baggy, roomy enough to layer over a fleece, and comfortable enough to slot under a shell. If weight and packability are top priorities, there are certainly down jackets that offer similar warmth in a lighter, more compressible package — but you will need to spend significantly more, and accept that they often will not be as tough or long-lasting as this one. At its best price, it is an absolute steal.Buy the Mountain Equipment Lightline at Go Outdoors →
FAQs
How warm is the Mountain Equipment Lightline down jacket?Very warm. Packed with 10.4 oz of 700-fill power down, it delivers amazing warmth immediately. We would reach for it on wild camps when the temperature is hovering around 3°C or lower.
What activities is the Mountain Equipment Lightline suitable for?Low-output activities in cold temperatures: low-intensity walks, sitting around camp, belaying. Not suited to high-output use or trail running.
How waterproof is the Mountain Equipment Lightline?Not a waterproof jacket. The ultra-durable 40-denier outer with DWR coating can handle very light drizzle, but wear it under a shell in anything heavier.
Is the Mountain Equipment Lightline worth the money?Absolutely. At £240 RRP — and substantially less when bought on sale — it represents exceptional value for money for the warmth, durability and quality on offer.
How durable is the Mountain Equipment Lightline?One of the more durable down jackets on the market. The tough 40-denier shell is highly resistant to scrapes and tears and performs surprisingly well in the rain.