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With technical fleece fabrics and a stretchy, windproof outer laminate, the Men's R4 Fleece Jacket holds the distinction as Patagonia's warmest fleece outer layer. Patagonia's Regulator fleece material has seen various incarnations over the past decade, and this season the warm, breathable, and highly compressible material utilizes a hybrid construction to further improve comfort. Soft R2 grid fleece lines the interior and provides soothing warmth while the outside is treated to Polartec Windbloc (separate from the windproof laminate) to take the bite out of the bitter cold winds of fall and winter. Wear the R4 alone when you're tearing your way up a new climbing route or use it as your insulating layer when you're sitting on a knife ridge waiting for a break in the weather so you can make the final push to the summit.

  • Windproof laminate stops wind and stretches so you get weather protection without feeling held back
  • Polartec Windbloc highloft exterior material provides further protection from the wind and adds to the overall warmth
  • R2 grid fleece interior lining insulates against the cold and it has a soft, smooth finish that easily slides over your base layer
  • Both the internal and external fleece materials are breathable for comfort and highly compressible so this jacket is easy to pack
  • Chest zip-pocket gives you limited storage for a few small essentials
  • Reviews
  • Q & A

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Fit is way small

  • Familiarity:I returned this product before using it
  • Fit:Runs small
  • Size Bought: Medium- too small

This is a great jacket. But be aware the fit is way small. I am at the middle to low end of the medium according to the size chart but when the medium arrived it was very tight under the arms. The same happend to my wife. She is always a small or sometimes an extra small. She could not even zip the small. The jacket overall appears warm and is soft. I have serveral other patagnia pieces including fleece and never had this issue.

A great outer layer or midlayer

  • Familiarity:I've used it several times
  • Fit:Runs small

I bought this once it went on sale, and I put it through the wringer over the last few weeks. It works great as an outer layer in temps above freezing, with an Icebreaker 260 wool shirt underneath; it blocked wind even when I was riding in my boat. When it got colder at night, I wore it under a heavy duty hunting jacket, and it was comfy and not terribly bulky. The collar fits great, not too tall or bulky where it gets in the way. I washed and dried it today, because it does tend to get stinky (like most synthetics), and it held up well and still fits the same. I am skinny (5'9", 135 lbs), but the small size still fits well, not too baggy in the arms or torso.

Get the R3 and some down

    The R4 is billed as ultra-warm, but that layer sandwiched in between, that makes it wind-proof, also makes this jacket feel stiff to me and limits mobility. No way is it as warm as down. I prefer the R3, which is incredibly soft, stretchy, and cozy, alone on some days, and under Patagonia's down sweater or Nanopuff on colder days. I also have somewhat wide shoulders and found this jacket too tight in the shoulders, yet too long in the arms. Both the R3 and a puffy (down or Nanopuff) have enough give and stretch in them to work. It is, however, a very nice-looking jacket, and I can understand how, if it fits your physique, you might like it as a more all-in-one option. I sent it back but love my R3, down sweater, and Nanopuff.

    Love this jacket.

    • Familiarity:I've used it once or twice and have initial impressions
    • Fit:True to size

    This jacket replaces a Patagonia fleece jacket from 30+ years ago for me! At first I was shocked at the lightness of it and the greatly reduced bulk compared with the fleece of those days. But even though I have not yet had it in really cold weather or in the snow, I can tell that it is a warmer jacket, and the windbreak is a welcome feature. The fit is nice, tending to slim. The sleeves are a tad long for me but that's fine in a cold weather jacket. I like how the collar stands up without getting in your way. I like the pockets: 2 handwarmers, 1 breast pocket, and 2 large interior pockets. The waist cinch cord is definitely a good feature. If there is anything more I could want from this jacket, it would be some sort of internal cuffs in the sleeves, but that's a minor issue. This is a beautiful, good fitting, classy looking jacket and I love it!

    Very nice fitting jacket

    • Familiarity:I've used it once or twice and have initial impressions
    • Fit:Runs small

    I originally ordered a medium in the jacket but I ended up having to return it and get a large as this jacket fits a little like a "slim-fit" although Patagonia says it is "regular-fit." I debated between the retro-x jacket and this one but in the end it was the better fit of the R4 that won me over as the retro-x was just too baggy on my tall skinny frame (6'2", 180 lbs). It fits well with a flannel on underneath it but much more than that and it would start to be a little tight so you may want to size up if you plan to use it with more layering.

    Which is warmer, the r4 or the mountain hardware monkey man 200 or monkey man grid fleece? Or if that comparison shouldn't be made because of the windproof layer, could you please use the r3 for comparison? Thanks a ton !

    Someone else might be able to chime in here who has more experience with the mtn hardware pieces, but I can say that for a fleece jacket the R4 is tough to beat for warmth. The high loft fleece combined with the stretch windproof barrier makes it one of the warmest fleece jackets out there, especially when worn on it's own. The R3 and the 2 hardware jackets will be toasty when layered with a shell over the top, but all 3 will feel a little chillier when worn on their own in the cold, especially if the wind kicks up.

    I have a 2005 R4 jacket that weighs in at...

    I have a 2005 R4 jacket that weighs in at 770g (27oz), which is around 1.5 times as heavy as this model (17oz). Is the 17oz weight based on a size small? My jacket is a size large. I am curious if Patagonia has slimmed this jacket down, or perhaps changed to a warmer material.



    Best Answer

    Solid question. Couple reasons the piece has become lighter, mainly fleece and windproof membrane technology have improved over the years, so Patagonia is able to achieve the same warmth and windproofness with lighterweight fabrics, which is ultimately the goal of the Regulator pieces. And additionally there has been a lot of bulk reduced around the center front zipper, removing fabric and streamlining the seams there where the fabric meets the zipper, making the jacket lighter and more comfortable.