This jacket is a MUST have for cool to cold weather hiking/climbing, skiing or even for casual wear. Its surprisingly warm without being bulky. Its also quite comfortable with a nice smooth finish on the outside and its stretchy. I got a large an I am 6-2 190 and fit perfectly, loose enough as not to look light tight fitting active wear but still feels close to the body. Could be cheaper but its worth it. Really a must have as base/mid layer or even as an outer layer on not so cold days.

My girlfriend bought me this jacket as a christmas present:)
So i was reading the review by aj..., and i have to say, it's pretty much everything i would say about the jacket:
-it's warm and comfortable
-it's not wind or water proof
-it's a slim cut to wear under other layers
-i like the zippered pockets
biggest problem is that the bottom side of the forearm pills after a few weeks of wear (but doesn't effect the function of the jacket).
overall would buy again, in fact i own the half zip too.

Apples to apples: compare this Marmot piece to other powerstretch tops on the market (e.g. Mtn Hardware's best-in-class Powerstretch Zip T), and you'll notice right away that this is NOT A PERFORMANCE FIT item.
Granted fit will vary based on your build & sizing choice:
I am 6'1", 165 lbs, with a 35" sleeve length, and I had to go with the L to get the wrist coverage I needed.
Even with the Medium I tried, however, the torso cut was roomy & the hem length is unusually long: Marmot has taken a traditional base-layer fabric and given it a mid-layer jacket design with full-length zip and hand pockets, and the end result is a very Cloudveil-like, roomy, new-school fit.
Don't expect too much of this piece as a stand-alone jacket: powerstretch isn't designed for abrasion resistance, offers little wind-resistance, and pills much more quickly, say than Polartec's beefier Windpro hardface fleece.
Where I do agree with the previous reviewer: this piece is amazingly comfortable. It excels over a t-shirt as a breathable spring/fall travel layer, or over your base layer and under a shell for colder days where the base layer alone just isn't quite warm enough.

This is a form fitting item. Do not expect to get much but a very thin baselayer under it, but damn is it comfortable. Glad I purchased it

I'm a tall gal and bought this jacket in a men's small. It is absolutely wonderful!! My fiance had the half zip and we love it too. These two products have convinced me to get on the marmot bandwagon!

I searched this out because I love Power Stretch and the few I have (which must be 10 years old now) were starting to look, well, not new. I really like the Marmot. It is heavier than my others and won't bridge seasons as well, but I've sure used it a lot this winter. The long sleeves are especially welcome as I have long arms and hate a gap at the wrist.

This unconventional fleece is great as a middle layer in the super cold, and equally great as an outer layer in warmer conditions. The outside of the jacket is not your typical fleece, it's more textured and not as soft, but the inside of the jacket is the soft micro-fleece material you love so well. the sleeve length is on the longer side, so if you have long arms, this is the one for you.

I bought the trousers with this as well the fit is perfect if you like the performance cut! You cant get much under the fleece i just wore a compression top. I wore the jacket and pants under an Arcteryx jacket and pants in Scotland and in the alps during winter time with out any problems, they are light and warm perfect for colder climates.

I got this jacket to layer under my softshell and it quickly became part of my kit. It is the best fitting xl-fleece I have ever thrown over my 6' 210# bulk... nice long sleeves without the tentlike fit. And the powerstretch material isn't matted in dog hair like everything else I own. yet.

This is not a typical fleece as one might expect from Marmot, but rather somewhere between fleece and softshell. It is certainly not windproof, but it is not intended to be. This jacket is great to wear over a compression top and under a waterproof shell as a mid-layer. it fits tight against the body keeping in warmth, and has ample comfort spots with really soft fleece, i.e. around the collar and wrists. Marmot tops, as a rule, have longer sleeve lengths, so if you need a mid-layer with a little more length in the sleeves, this lightweight, attractive fleece is for you!

This is an excellent insulating layer for the brisk chill of the outdoors. Add it to a nice base layer and you have a comfortable warmth to operate with for those moments when a softshell is too many layers for you.

Pros: Excellent insulator, performance fit, high collar helps with soft zip edges.
Cons: Not windproof nor waterproof at all(but not supposed to be), fabric on the underside of my forearm started to micro pill after only a few uses (probably from resting/rubbing my arms on tables).

Overall its a great addition to your wardrobe. Excellence.. I'd buy another if I had to, except the next time I'd get the blue one.

Love the nosewipes. It keeps me warm. It's comfortable and has very long sleeves. (I pull them back over themselves when I'm doing things and let them hang over my hands when I'm cold).

The Power Stretch is a great lightweight layer or warn by itself. Stylish, yet functional. After I bought mine, I bought two more, one for my wife and one for my son (13) - because he kept wearing my wife's. I've always had high expectations for Marmot clothing and gear and this jacket will not disappoint.

I bought this to replace my old NF windbloc that gave me 8y of good service! About the Marmot Power Stretch:
- take on size smaller (I take normally L in European size (Rab, Icebreaker, etc), with this I had to take a M.
- fit is very good, collar also, sleeves are long enough if you want to make tumb holes.
- is it very compact and light (300g)
- is is very comfy and warm as a fleece 200
- it is slightly water repellent and wind resistant
Definitively a good purchase and perfect combination with a wind jacket!