This vest is extremely versatile and warm considering how small it packs down. I wear it touring regularly because it breathes well and provides a great layer of warmth to keep in your pack.

This was given to my sister as a gift, and she likes the simple style and fit. It's very light, and a nice top layer for most outfits and occasions. Great buy

Great vest for layering on those colder days or wearing as a top layer when it warms up. Packs down fairly small if you need to stuff it in a pack. Bought this as a gift and she loves it.

I love the warmth this offers with how thin it is! The biggest downfall is that the sleeve cuff is a little tight on my shoulder but not enough to be too uncomfortable. I got the galah green color and love it!

The grey is a beautiful color, but because the fit is too loose in the waist I look heavier in the gray compared to the black.
Will keep the black one. Large bust but my waist is not

Bought this vest as a gift for my sister. It is very warm and perfect for cool evenings in the city! Patagonia never seems to let down!

I love this vest! It works double duty, for activities like backcountry skiing and running, or for just casual use. The Nano-Puff fabric provides the perfect insulation for spring days and breaths fairly well. Having three pockets is also great. The fit is a bit boxier, as most Patagonia seems to run. Otherwise, runs true to size. This is my second nano-puff vest and I have found they are very durable for years of abuse.

Got this vest for my wife and she loves it. It is great for when she doesn't want to wear her full nano puff jacket. This vest is light weight but also warm. It goes great with all of her causal outfits but is also a functional piece when we are hiking.

My daughter loves backcountry skinning and skis 45 days a winter with her ski mountaineering group. This is her favorite piece of gear! Great for layering/warmth, wicks sweat so keeps her dry, very light and easy to compress/stow, minimum bulk under her shell, very durable in the brush and when hiking with skis. Worth every penny!

I have several down vests but they are going to be donated because this one is the best! It's amazingly warm for as lightweight as it is. I wear it for outerwear in mild weather and in my office at work when the lades turn the a/c down! I love this!

I'm tall and slender, so Patagonia (sadly) tends to look a little boxy on me. The Nano Puff fabric is sleek, smooth, and surprisingly warm, but the cut of the vest is such that a small is fitted but too short, and a medium is boxy/wide/baggy but a more reasonable length. I've found that the Arc'teryx Atom Vest is a much better cut for tall gals like myself.

I've bought this vest for my husband, sister, and now my mom. And, of course, I have one too! Everyone loves them! So warm, but not bulky at all. I think they run a bit loose so I size down in them. Fantastic quality, and so cute. I'm sure this won't be my last nano puff purchase. :)

I wear this vest for just about everything. Come winter, I'm cold - all the time, so a vest provides just-enough extra warmth without bogging me down. The Nano Puff is lightweight and I barely notice that I'm wearing it. I have a few other Patagonia vests, but the Nano Puff was actually my first and totally set the standard for subtle warmth and comfort.

The synthetic insulation keeps me warm—even when wet, so I'm able to wear this vest on its own in inclement weather or layer it underneath a hard shell when the conditions call for it. I do don it casually as well, mostly because the warmth is so subtle and comfortable that it's hard not to rationalize wearing it all the time. The two hand pockets keep small necessities close, and the drawcord hem allows me to seal in warmth should I need to. I purchased the black and after 3 years of solid wear and tear, it still looks brand new. Also, I have dogs, so I'm constantly being bombarded by muddy paws and dog drool, which the vest has withstood ceaselessly.

As for the fit, I picked up an Small because I wanted to have the option to layer underneath it should I desire. Typically, to achieve a more form fitting look, I wear an XS, but do wear a Small when I want more wiggle room.

Bottom line: this vest set the stage for my current love affair with vests, and I'm sure it will do the same for you!

It is so nice to own a vest that is not overly puffy. This is warm and fits over everything, but lays flat for a slender fit.

I bought this for my wife for her birthday. She loves it, fits great and is very comfortable without being bulky

I am 5’5” and have a 34” bust. I ordered a size small. I would recommend a medium due to the arm hole diameter. It feels slightly tight, but not enough to exchange it. The vest does an amazing job of regulating my body temperature, and has maintained its warmth in wet, cold outings. Unlike some other Patagonia tops I have tried, this one has a more tapered fit like an Arcteryx item.

I love this vest! It is super light weight but still durable. Great for stuffing in a pack when you are out backpacking or hiking but it still looks stylish if you dress it up with a scarf or boots. I have it in 2 colors now and will probably get another at some point.

This is my go to vest for every adventure! The nano puff vest is light weight yet very warm. I love wearing the bank puff and a sweater on a spring day. It's made very well and is versatile.

I wear this vest whenever I can. It's super light, packs up tiny for travel, and has about a million uses. I wear this is a layer while skiing, hiking, running, or just about anything. It's not heavy or thick at all, it really is super thin, but stays very warm and is great at insulating heat. It's not cheap, like most of Patagonia, but you will have this vest forever, so need to ever buy another one.

Just like any Patagonia product.. excellent craftsmanship, fits well, last forever and a bit pricey.. Anyways, these are bomb proof and probably I will hand these down to my grandchildren one day.