Rab Microlight Alpine Down Jacket Review

Overview

The Microlight Alpine is Rab’s do-it-all hooded down jacket, built for cold camps, shoulder-season ridgelines and the long drive home afterward. It trades the gossamer shell and high-fill-power down of a dedicated ultralight puffy for a hardier face fabric and a generous helping of insulation. The result is a jacket that is warm and durable but sits on the heavy side for gram-counters.

Key Specs

Spec	Detail
Weight	413.5–466.5 g depending on version
Insulation	Recycled 700FP down with Nikwax hydrophobic finish
Fill weight	153 g (size L)
Shell	Recycled 30D nylon Pertex Quantum, 50 g/m², with DWR
Lining	Recycled 20D nylon, 38 g/m²
Construction	Zoned micro- and nano-baffle stitch-through
Hood	Adjustable, with stiffened peak
Pockets	Two YKK zipped hand pockets, one large zipped chest pocket
Fit	Regular
Product code	QDB-12

Performance

Warmth. The Microlight Alpine carries about 5.4 oz of 700-fill down in the men’s size L and 5.1 oz in the women’s size 12. That is closer to a true midweight jacket than to a typical ultralight puffy. Better Trail’s testers put it at about 32°F for comfortable sitting-around warmth, depending on layers. They also noted it holds more down than the Arc’teryx Cerium (3.2 oz of 800-fill) or Patagonia Down Sweater (4 oz of 800-fill), and lands near the Arc’teryx Thorium (5 oz of 750-fill). CleverHiker’s testers rate it as reliable in cold, dry conditions. They also say it isn’t the warmest jacket they tested, an honor that goes to Rab’s own Neutrino.

Wind and weather. The Pertex Quantum shell is the jacket’s quiet strength. It blocks wind well, which matters on exposed saddles where a breathable shell lets heat bleed out. The DWR finish and hydrophobic down add a buffer against drizzle and condensation. Owners describe the jacket as very water resistant for a down piece. Better Trail’s testers, however, scored weather resistance at the middle of the scale and called it unsuited to wet-weather missions. It is a margin of safety on a damp morning, not a substitute for a rain shell.

Weight and packability. This is the jacket’s weak spot, and every reviewer says so. At 466.5 g for the men’s and 413.5 g for the women’s, it is well above the weight of dedicated ultralight down jackets. The 30D shell and 700FP fill both cost weight and compressibility. CleverHiker notes that the Microlight usually gets docked for weight and packability, and that the plush down is not the most compressible. It stuffs into a separate stuff sack rather than its own pocket. An early review measured a pack size of about 150 x 220 mm in the supplied bag. Better Trail’s testers also found it too bulky to slide under a trim rain jacket or hardshell as a midlayer.

Durability and comfort. The 30D face fabric is where the weight goes, and it pays off. Better Trail calls it more hardwearing than most ultralight puffies. CleverHiker’s verdict comes after six years of hard use, and it is still a recommendation. The stiffened hood peak and wire-brimmed hood fit well over a hat, and soft material guards the chin when fully zipped. Cuffs are internally elasticated and the hem cinches with a drawcord. Reviewers’ main fit complaint is the lack of interior drop pockets for stashing gloves or a hat.

Choosing a Version

The two versions share the same fabrics, construction and features. The differences are cut and insulation load. The men’s jacket has a regular fit and carries 153 g of down in size L, with a center-back length of about 30 in. The women’s carries slightly less, 145 g in a size 12, and shaves roughly 50 g off the total. Choose by fit rather than performance. Both are regular cuts that leave room for a fleece or light midlayer underneath, so sizing down in pursuit of a trimmer silhouette costs warmth.

Pros & Cons

Pros

• Generous insulation: about 5 oz of down puts it in midweight territory
• 30D Pertex Quantum shell resists snags and blocks wind
• Hydrophobic down and DWR shrug off light moisture
• Zoned micro- and nano-baffle construction keeps warmth where it counts and bulk down under the arms
• Stiffened hood peak and a large zipped chest pocket
• Costs less than most ultralight alternatives; reported list prices run roughly $295–$325

Cons

• Heavy for the category at 413.5–466.5 g
• 700FP down is less compressible than higher-fill-power rivals
• Stuff sack instead of a stuff pocket
• No interior drop pockets
• Too bulky to layer comfortably under a close-fitting shell

Who Should Buy This

The Microlight Alpine suits hikers, climbers and ski-tourers who want one durable down jacket for cold camps, belay duty and town. It also suits anyone who has shredded a 10D puffy on a branch. It is a strong buy for shoulder-season backpackers who value a tough shell over a few ounces. Thru-hikers building a sub-5-lb base weight, or anyone who needs a jacket that disappears into a quart-sized stuff sack, should look at lighter 800FP-plus options with thinner shells.

Verdict

The Microlight Alpine is a warm, wind-tight and long-lived down jacket at a fair price, and its main flaw is mass rather than performance. For general mountain use it earns a recommendation. For ultralight lists it is a heavy line item.