Review: Rab Men’s Microlight Shield Waterproof Down Jacket

A clever combination of down insulation and proper waterproof protection, designed to make cold, wet days considerably more comfortable.

Feature type Review

Read time 4 min read

Published Sep 06, 2026

Base editorial team
BASE editorial team BASE writers and editors who live and breathe adventure every day. We love adventure storytelling as much as we love adventure itself.

Our Verdict

Rab has taken one of its best-known down jacket designs and given it a significant upgrade: a fully waterproof outer. The result is the Microlight Shield, a hybrid jacket that combines 700FP recycled down insulation with a two-layer Pertex Shield waterproof membrane. It’s a banger

RRP £300
Weight 698g (size M)
Features 700FP recycled hydrophobic down (146g, size M), 2-layer Pertex Shield waterproof fabric, 20,000mm hydrostatic head, 20,000g/m²/24hr breathability, adjustable insulated hood, articulated sleeves, YKK AquaGuard front zip

Pros

  • Combines genuine waterproof protection with down insulation.
  • 700FP hydrophobic recycled down provides impressive warmth.
  • 20,000mm waterproof rating is reassuring for sustained wet.
  • Cleverly positioned baffles help maintain freedom of movement.
  • Warm, insulated hand pockets.

Cons

  • At 698g (M), it’s relatively heavy for a down jacket.
  • £300 is a substantial investment.

WHAT I’M LOOKING FOR

I’m looking for a garment that can handle prolonged exposure to the wet  while providing enough insulation to keep the cold at bay. It needs to be comfortable when moving, practical when stopping and sufficiently breathable that a bit of uphill exertion doesn’t leave you feeling like a boiled potato.

The other question is whether combining two traditionally separate pieces of kit into one actually makes life easier, or simply creates a heavier, less adaptable compromise. That’s the interesting proposition behind the Microlight Shield.

FIRST IMPRESSIONS

At first glance, the Microlight Shield looks more like a substantial winter waterproof than a traditional down jacket. The familiar baffles are there, but they’re wrapped in a smooth Pertex Shield outer that gives the whole thing a slightly more technical, weather-ready appearance.

The construction is clever. Rab has used 700FP recycled down with a Grangers hydrophobic treatment, distributing it across larger micro baffles around the main body and smaller nano baffles down the sides and underneath the arms. The idea is to concentrate warmth where it’s most useful while reducing bulk where freedom of movement matters.

There’s a properly adjustable hood with an integrated peak, fully articulated sleeves, elasticated internal cuffs and a drawcord-adjustable hem. Two insulated hand pockets sit behind the down baffles, with an additional zipped chest pocket for smaller essentials.

The front is secured with a YKK AquaGuard zip and an insulated baffle to help prevent cold spots.

It’s a reassuringly comprehensive specification. The regular fit also leaves room for a thin midlayer underneath without feeling excessively bulky.

THE TEST

Tested through a British autumn in the low hills and along the coast, the Microlight Shield encountered pretty much the conditions it was designed for. Temperatures dipped to around 8°C, downpours were frequent and the combination of damp air, exposed terrain and coastal weather made reliable insulation particularly welcome.

The first thing to appreciate is the convenience of the concept. Ordinarily, you’d be carrying a down jacket for warmth and a waterproof shell for when the heavens open. Here, they’re effectively combined. There’s something pleasing about being able to head out in one jacket without having to keep making decisions about what the weather might do next.

WHO IS THIS ITEM FOR?

The Microlight Shield is particularly appealing for UK use, where the distinction between a waterproof jacket and an insulated jacket can become rather academic for much of the year. Coastal walking, low-level winter hikes, countryside exploring and general outdoor adventures are all natural territory.

It’s less suited to fast-and-light mountain running, high-output trekking or activities where temperature regulation and minimal weight are the priorities. For those, a separate layering system will generally offer greater flexibility.

But if your idea of a good day outside involves covering some ground, stopping to admire the view and not having to worry too much about what the weather is doing, this is a very attractive proposition.

WHAT STANDS OUT?

The obvious attraction is the combination of down insulation and a proper waterproof membrane but the shape and fit of this jacket deserve a mention too. You feel protected without feeling overly puffed up, bristling with noise every time you make the slightest move.

THE INSULATION

The 700FP recycled down has a Grangers hydrophobic finish, helping it resist moisture and retain its insulating properties in damp conditions. With 146g of down in a size medium, there’s a meaningful amount of insulation here, rather than just enough to take the edge off a nippy morning.

THE BAFFLE CONSTRUCTION

The combination of larger micro baffles across the body and smaller nano baffles beneath the arms and down the sides is a thoughtful piece of design. It allows Rab to concentrate insulation where it’s most useful without creating unnecessary bulk around the areas where you need mobility.

THE WEATHER PROTECTION

A 20,000mm hydrostatic head and 20,000g/m²/24hr breathability rating put the Microlight Shield firmly in serious face waterproof territory. Add the adjustable hood, insulated front zip, elasticated cuffs and drawcord hem, and it’s clear that Rab has thought about keeping the elements out rather than simply making a down jacket more shower-resistant.

VALUE FOR MONEY

At £300, the Microlight Shield is a significant investment. There are plenty of excellent down jackets and waterproof shells available individually for considerably less, so the obvious question is whether combining them justifies the premium.

The answer depends on how you spend your time outside. If you already own a good collection of technical outerwear and enjoy adapting your layers to different conditions, the Microlight Shield may feel unnecessarily specialised. A separate down jacket and waterproof will give you more options.

But if you’re regularly out in cold, wet conditions and value the convenience of having both functions in one garment, the proposition becomes much more compelling and, personally, I have not seen a better option at this price-point. You’re effectively getting a waterproof and insulated jacket in a single package, with less to carry and less to think about.

The 700FP recycled down, Pertex Shield construction and considered baffle design also suggest a product built for regular outdoor use rather than occasional winter wear, so you are definitely likely to get serious value from this.

BASE BOTTOM LINE

The Rab Microlight Shield is a very interesting evolution of the traditional down jacket, and a particularly relevant one for British-type conditions. Combining 700FP hydrophobic down with a genuinely waterproof Pertex Shield outer is a smart bit of thinking. At £300, yes it’s a considered purchase. But we wager one that will stand the test of time and you in good stead, whatever the weather

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