How to Choose Insulated Jackets

Avid hikers and backpackers will love this lightweight REI Co-op hoodie. Its 60 g PrimaLoft® synthetic insulation provides warmth in the backcountry. Plus, it packs into its own pocket.




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Imported.
View the REI Co-op Microtrek Product LineView all REI Co-op Men's Synthetic Insulation Jackets| Best Use | Hiking |
|---|---|
| Fabric | 100% recycled ripstop polyester (bluesign approved) |
| Lining Fabric | Polyester |
| Insulated | Yes |
| Insulation Type | Synthetic |
| Insulation | 60 g PrimaLoft 100% recycled polyester |
| Warmth | Warm |
| Hood | Yes |
| Packable | Yes |
| Back Length | Hip-length |
| Back Length (in.) | S: 28.5 inches M: 28.5 inches M Tall: 30.5 inches L: 28.5 inches L Tall: 30.5 inches XL: 28.5 inches XL Tall: 30.5 inches XXL: 28.5 inches XXL Tall: 30.5 inches XXXL: 28.5 inches |
| Gender | Men's |
| Weight | 1 lb. 0.1 oz. |
| Sustainability | Contains materials that meet the bluesign® criteria Contains recycled materials From a Climate Label Certified brand |
Fits slightly large based on reviews
| XS | S | M | L | XL | XXL | XXXL | 24 IN Waist | 26 IN Waist | 28 IN Waist | 30 IN Waist | 31 IN Waist | 32 IN Waist | 33 IN Waist | 34 IN Waist | 35 IN Waist | 36 IN Waist | 38 IN Waist | 40 IN Waist | 42 IN Waist | 44 IN Waist | 46 IN Waist | 48 IN Waist | 50 IN Waist | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chest | 35 | 36 - 38 | 39 - 41 | 42 - 45 | 46 - 49 | 50 - 53 | 54 - 57 | |||||||||||||||||
| Sleeve Length | 32 | 32.5 | 33 | 33.5 | 34 | 34.75 | 35.5 | |||||||||||||||||
| Waist | 27.5 | 28 - 30 | 32 - 34 | 36 - 38 | 40 - 42 | 44 - 46 | 48 - 50 | 24 | 26 | 28 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 |
| Hip | 33.5 | 34.5 - 36.5 | 37.5 - 39.5 | 41 - 43 | 44 - 46.5 | 47.5 - 50.5 | 51.5 - 54.5 | 32 | 33.5 | 34.5 | 36.5 | 37 | 37.5 | 38.5 | 39.5 | 40.25 | 41 | 43 | 44 | 46.5 | 47.5 | 50.5 | 52.5 | 54.5 |
| Inseam | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
Measurements are stated in inches unless otherwise indicated. Size chart values represent body measurements, not garment measurements.
SHORT: Some pants are available in short sizes, which generally means an inseam that is 2.5 inches shorter than regular sizes.
TALL: Some pants, shirts, jackets and parkas are available in tall sizes, which generally means an inseam that is 3 inches longer and a rise that is 1 inch longer, a shirt or jacket body that is 2 inches longer, a parka body that is 2.5 inches longer and sleeves that are 2.5 inches longer than regular sizes.
Capri or cropped pants have an intentionally shorter inseam—reference the technical specs instead of this chart.
Inseam is measured to the floor.
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.


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At 5'11" and 180 lbs, the medium REI Co-op Microtrek Insulated Hoodie offers a comfortably roomy, non-athletic fit that provides ample space for layering heavy clothes underneath. It has proven to be an excellent everyday casual piece for the elements, keeping me very warm during active tasks like shoveling snow in Minneapolis temperatures ranging from the 20s to the 30s. While it feels like a significantly more affordable version of my technical La Sportiva Phase Down Jacket, it maintains impressive thermal protection and versatility for daily use. This hoodie excels as a practical, high-value workhorse for anyone needing a reliable outer layer that balances warmth with a relaxed, layer-friendly silhouette
Very comfortable, true to size fit. I would definitely recommend!
I’ve been really impressed with this hoodie so far. The color is fantastic — a greenish blue metallic gray that looks even better in person than online. The material is super soft and incredibly lightweight, making it comfortable to wear for long periods without feeling bulky. One of the standout features is how packable it is. It compresses down very small, which makes it easy to throw into a backpack for changing conditions or travel. Sizing seems true to size overall. I intentionally ordered one size larger than I normally wear, and it fits a bit big, as expected. That said, the extra room actually made it excellent for layering. I wore this jacket on a day that was 34°F but felt like 22°F, and I stayed comfortable while moving. I used it as an outer layer over a hooded sweatshirt, and it performed really well in colder, windy conditions. It does a surprisingly good job blocking wind for such a lightweight piece. The hood is also a huge plus — it covered the back of my neck well when a stocking cap alone wasn’t enough to keep me warm. If purchased in your normal size (or even slightly smaller), I think it would also work very well as a mid-layer under a heavier jacket. Overall, this is a versatile, lightweight insulated hoodie that packs small, layers easily, and performs better than expected in wind and cool weather.
Extremely light and warm! Live in New England and have work nothing but a t-shirt or flannel under this jacket and was not cold at all in 10 degree weather. Fit is great, true to size, not too tight on the chest or arms. I am 5’7” 175 pounds with a wide chest and this still fits great (not too long on sleeves or waist) and allows for great mobility. Also not nearly as puffy looking as most of these style jackets which I love! Buy it and you will not regret it!
I have several REI jackets and each one has a specific purpose when I am outside, hiking, climbing, biking and camping. This REI Microtrek Insulated jacket is the perfect blend for hiking in my nearby park of Acadia. It is lightweight, warm and I am also using it for early morning rides on my mountain bike. An extremely versatile jacket.
Bought this about a month ago and so far, its been great! It's taken a beating from my cat and tree branches and is still in perfect shape. I use it to bike in the early mornings and all-round everyday use. I run really hot so this jacket keeps me toasty. I did have to size down because it was a bit long in the arms and wide in the torso. I haven't washed it yet so we'll see if it shrinks
This jacket has exceeded my expectations. It's not the warmest model available in REI's lineup, but I've worn in multiple times in sub-freezing temperatures and haven't felt cold yet. The wind protection is excellent. This weekend I was outside in 18F temperatures with a 24 mph wind gusting to 40. I felt the wind through my wool gloves, through my denim jeans but not all all through the Microtek. I can't believe it's so light yet so strong against the elements.
Great addition to my winter hiking gear. Lightweight and warm, paired with a base layer and fleece mid layer this offered plenty of warmth for Ohio winter trails as low as 15 degrees. Great pockets too. Fits true to size plus a little to fit bulky under layers if needed.
Only had it a few weeks now so can't speak to long term durability. But it currently is a very nice jacket. Not too thick and puffy but also warm. Pretty lightweight with lots of pocket space. Been very happy with it so far.