Patagonia makes a great product and this is no exception. Light weight and warm and solid construction.

This puffy provides enough insulation and is super packable. Also a great lightweight jacket for using around the town.

I'm very pleased with this jacket. I'm finding it great for any type of conditions. When I got my hands on this jacket I didn't realize how great it was for being on the thinner side.

I bought this jacket for a camping trip that I was taking to the Grand Canyon in early March. The weather was going to be in the 50's during the day and right around freezing at night.
I was very pleased with how the jacket handled the cold! In the mornings and at night I would wear a sweatshirt combined with this jacket and be very comfortable! It kept me warm and was comfortable enough to wear all week. I also enjoyed the fact that it had a hood, that was nice to have at night around the campfire.
I also happen to know that its comfortable enough to sleep in, since my sleeping bag wasn't as warm as I hoped I was in the jacket nearly 18 hours a day for a whole week. It held up well and would buy it again. It will also be a great 3 seasons coat for around town. I constantly find myself reaching for it!
My only complaint is that one of my cuffs is more stretched out than the other, which I'm sure is just mine. It is the typical Patagonia sizing so the sleeves run a little long, just be conscience of that when buying.

I use this jacket primarily as a mid-layer, under a shell, on cold days. The warmth to bulk ratio is incredible. Where a down jacket, under a shell, would normally make you feel like Frankie's little brother (A Christmas Story), the Nano Puff wears like a light fleece with twice the warmth. I live in the CO mountains, where the weather changes every five minutes, the Nano Puff packs down so small that its a no-brainer to stuff into a messenger bag or small day pack. All this, and there is a fantastic bonus... the Nano Puff hood is designed to fit UNDER a helmet (...mind blown...). If you ski on Hoth, no worries, hood under helmet = super toasty.

Purchased this as a Christmas gift for my fiance, as he had been lusting over these jackets for some time but would never spend the money on himself. He loves it! It's very light but warm. He layers it under a hard shell/rain jacket on cold, snowy/wet days, and wears it on its own when it's clear. It fits true to size. However, I do worry about the strength of the material, as it arrived with a rip in the outer fabric above the Patagonia label. Backcountry was great about exchanging, I just hope this jacket holds up long term. Also, Paintbrush Red is very much ORANGE. His favorite color is orange so I took a chance, hoping the photo was more accurate than the color name, and it is indeed orange.

(I used his measurements in this review)

I gifted this to my friend and have his feedback to share:

The nano-puff is the most versatile jacket I’ve ever owned. I’ve been looking for an insulating layer that I can also wear casually in town. I wouldn’t go hiking without this jacket. It fits in its pocket and in my pack till I reach the summit. Once up there, it provides excellent wind resistance and warmth even on days in the 20s. I am 6’ 175# medium build and a large fits well with room for base layers underneath or for a shell over top.

Uses:
Backpacking, casual, snowboarding

I gave this as a gift. the recipient loves it and says it is very warm and comfortable both around town and under a ski jacket

This jacket is perfect for wearing around town or at camp, but it holds moisture like a sponge on the inside. This is not a great jacket for hiking (in my opinion) because of its lack of venting. However, I do take it backpacking to wear around camp at night, and it packs down very small to attach to a harness or bag. I have owned it for almost 2 years, and it is still holding up great. The only complaints I have are: 1 - lack of venting. and 2 - it holds on to bad body odor until it is washed

The warmth and fit on this jacket is awesome. It's very light weight, and for a synthetic fill, it provides a lot of warmth. The hood is a really nice functional size, and the internal pocket is a nice addition.

My only problem is that the stitching on the outside of the jacket snags on everything, and I am constantly getting pulls in the threading, and having to cut them off with my pocket knife

One thing I like is that it's light weight but feels more resilient (wont lose loft after a lot of use etc.) than the mountain hardware ghost whisperer. I have both and use this more so as a daily jacket, and limit the use of my ghost whispered as my backpacking/mountaineering jacket to keep it from wearing out too fast.

I love the way this jacket can be used. I use it for Skiing under a shell and its perfect. But, best of all its great for when your not skiing.

This jacket is just what I’ve been looking for! Light to carry / fits awesome - perfect jacket for street and mid outer wear + its Patagonia!

Great jacket, keeps me warm and cozy!

Darn good jacket from Patagonia. This has become my go-to over my Patagonia down hoodie, due to the packed size and warmth. Being 6' with long arms and an athletic build, I can usually wear either M or L. I went with a large in this jacket because I would like to wear a base layer or two below it and use it as a stand along shell on balmy days.

I like the Nano Puff because the face fabric seems more durable than most other comparable jackets.
It is a great layer for a variety of technical purposes, though i probably wear mine most to walk my dog.
It is a pretty terrific belay jacket to bring along on multi pitch climbs as it packs down and is easy to stash while climbing.
I get cold super easily and I kind of like climbing in a layer - the nano puff isn't indestructible but gear tape fixes the holes nicely.
In terms of fit, I think the Nano Puff is pretty boxy. I've heard a lot of complaints about the fit but I like the relaxed cut. I think the Nano Puff moves a lot better than the Nano Air and Arc'teryx's Atom LT, both of which are cut more 'athletically.' The looser fit allows better mobility - freedom of movement is pretty important to dog walkers and climbers alike.

Bought this jacket as a gift for my father. He really enjoys this jacket. He says he loves using it for cold morning walks or cold drives into work. Works perfect as a base layer under a nice shell.

For three years, this was my absolute go to piece, then I got the Patagonia Nano Air hoody and this Nano Puff has fallen to my second most reached for layer.

While the Nano Air breathes quite well for a midlayer, this Nano Puff does not, which is sometimes a very good thing. I run hot, and if hiking or climbing in cold temps, I can work up a sweat wearing very little all the way down past freezing. So if on a climb, the Nano Air would be a much better choice for me at a belay station, where I'm subject to get chilly from the wind while I sit for maybe an hour. Similarly, while hiking, I may be in a tshirt or thin baselayer while moving, but when we stop to eat or regroup I want to trap all that heat I've worked for, and not let the wind steal it all. I still bring the Nano Puff for both of these situations.

The Nano Puff packs down incredibly small for a windproof, synthetic piece. That makes it a prime contender on summer backpacking trips to the alpine, where we know we may see freezing temps overnight or cold and windy storms during the days. While being coated with DWR, and windproof, this isn't a rain shell and will need to be layered properly in a downpour lest it wet out. Luckily, being synthetic, it'll still keep you warm when wet, but it definitely won't be comfortable and you'll have to wear it dry in your tent for hours. This quality makes it an awesome emergency piece, a just in case safety net that weighs 3/4 of a pound but will cut wind or cold in any scenario.

Mine has been incredibly durable, 5 years in now, with only a few small patches from wear and abuse. I take good care of it, but I don't baby it like I am known to do with some down jackets.

The fit on mine, again a model from many seasons back, is smaller than my Nano Air from 2015. The cut is a bit short, and the arms are too, but I still like the look more than sizing up and swimming in the chest. I'm unsure if Patagonia has changed the cut since, so can't speak to the newer versions.

This is a great, practical midlayer that fills many holes in the wardrobe. It is not a breathable midlayer, if you keep that in mind, you will not be disappointed, as it will keep you warm and the wind at bay.

This is an amazing little hoodie...it is so light...especially when I took it out of the shipping box, I thought I had made a terrible mistake...this is too thin to be warm...but I put it on and with the jacket zipped up and the hoodie on with a light merino base layer and a Fjallraven Bergtagen Jacket as the softshell, I went out in a very cold rain and I was warm as toast.

A great mid layer or as a stand alone jacket for the town or trail. It won't block rain or snow, but the synthetic insulation still retains heat if it does get wet. The hood adds some extra warmth and is designed to fit under a helmet.

I have been a Patagonia enthusiast for several years now and am slowly spreading the joy to my boyfriend. At first glace, he was not impressed with this jacket, but after a few hours, he had been won over. He also recently took it on a work trip to South Dakota where temperatures were around 30 degrees and he said it kept him warm enough. He was surprised by the amount of warmth for how thin/lightweight it is. Duh; that's what I'd been telling him all along. Wearing a Patagonia jacket is like being wrapped in a warm hug. What more do you need to know?