I purchased these "moon" boots as belated birthday gift for an old friend who was headed on a winter camping backcountry ski trip to the Ruby Mountains in Nevada, and this is what they had to say:

"Initially I thought I would just use these on my backcountry trip, but little did I know that I would begin using them daily...

On the trip, they packed down flat and easily slid to the bottom of the pack. While at camp, these boots lived on my feet. The thick foam on the bottom kept my feet warm while walking/standing on the snow. This was something the other members in my group wished their booties had, a thicker foam sole. The sole also was great at shedding snow, meaning when I crawled into the tent at night, the snow (and moisture) stayed outside. The high synch on the boot also allowed me to walk through the snow, away from camp to take care of business, without worrying about snow entering the booty. Not to mention the DWR coating worked extremely well preventing the down from wetting out.

I have to be honest, every time I put the booty on, I thought that it would not be warm enough. 5 minutes later, my feet were always toasty warm, a tiny luxury when in the back woods.

As for the fit, I highly recommend following the size guidelines! I purchased the Large and my feet are size US 10. Down needs to loft up, and although it may feel like there's extra space in the boot, that space is important in heating efficiency and effectiveness."

I ordered these 'standard' booties, the expedition version and the lower profile version. I want these booties mostly for wearing in a hut, bio trips at night, and in my sleeping bag when the temperature drops on winter snow camping trips. I'm keeping these (standard version), they have a non-slip bottom, more foam structure in the footbed + skuff resistant fabric around the footbed and toes, and go up a bit higher around the ankle. They fit very comfortably in my sleeping bag even with the thicker foam footbed. The lower profile booties take up a bit less space in a backpack but look more fragile and IMO are best for wearing in your sleeping bag or on a plane - they are not supportive enough and too slippery for extensive home use or to wear around camp. The expedition booties are a bit sturdier still and look like you can wear them around camp and they will take some beating but for backpacking they are a bit bulky. Maybe best for car camping and longer mountaineering trips. For me the standard booties were the best compromise. I wear women's size 8 and the men's small is a great fit with thick socks.

I very much enjoy using these booties. I have hardwood floors, which are beautiful, but can be pretty cold in the winter. I also suffer from gout, which can be aggravated by cold feet. This led me to purchase these booties, after comparing many other products on the market. Foremost, they are incredibly warm. Many others have said 'ovens for the feet' and I would concur with that term. I also very much appreciate the non-slip surface. Even when I try to make them slide on my hardwood they grip like a gecko. Once, I even wore them on my deck in fluffy snow and they still didn't slip! As for fit, I wear a 12 and got "large" and they fit great, so I concur with those who say they run large. (I think large might still fit a 13!) Their outside appearance is also huge, of course, being down filled, so you may have to listen to 'clown feet' remarks when you're wearing them. As to durability, they seem durable to me. I'm notoriously hard on shoes, and haven't seen any wear on them. The only thing I'd like better is if Backcountry had stocked more colors. The only color they had in my size was my least favorite, but my feet outvoted my eyes. I have worn them daily for a few months and have no qualms rating them "perfect".

Haven't used these yet, but was a tiny bit let down when seeing these in person. The stock photo gives an impression that the material is a lot more rugged than it actually is. Nevertheless, I'm confident theyll be just fine for their intended purpose: wearing them around a yurt. One nice feature i do like is an internal elastic that keeps the cuff snug around your ankle. Its compfy, will probably help keep snow out when i accidentally post-hole to the pee-tree in the dark, and it feels like it builds and maintains heat better around your foot!

Alaskan home with dog door = cold floors. I ordered these just in time for -15 temps! Very very happy M for my women's size 10 is perfect.

I was looking for a great warm shoe to slip on when I needed to run out to my car super fast. These booties aren't technically designed to be worn AS SHOES, but I have been doing just that and they are holding up really well!



They feel like clouds on your feet and stay extremely dry if you are walking on snow. I can't wait to take these out backpacking to wear at camp.



I wear a size 6-6.5 shoe, and the size Small bootie fit perfect.



I haven't fully submerged them in snow or in water, and I wouldn't recommend it if you want the down to stay nice and fluffy.

but they run very large, one full size larger. The sole is especially impressive for its water-resistance, insulation, and comfort. They are amazingly light weight. I too shovel snow wearing these. When it's really cold in the house and I'm inactive, I'll wear them with thick woolen socks and down socks as well. Room enough in a size M for all that and my size ten and a half or eleven feet.

I guess I'm in the minority here, but I think they could be a little warmer. They're pretty good. I got them for my house because it can get really cold during The materials and construction are solid, there's plenty of down around the top of your feet, but I think the sole could use a liner or something. That's my only criticism. Maybe they're better when you're active outdoors. I'll also add they're pretty easy to walk in and have solid support for casual walking. I wouldn't recommend serious hiking or similar activities in them, but for strolling around a campsite or flat they're fine.

These are little cast iron stoves! They are suuuper warm, probably 3 times as warm as the flash booties. So, definitely the pick for winter camping and around the house, if you live in the mountains. The Flash is great for summer, high-alpine trips.

The sole is stiff, but the down top compresses really well. So, you can't squish it into a ball, but you can smash them down into a flat plank.

There is fabric on the soles, as these are meant for walking on snow. But, it you want to wear them repeatedly on the dirt and rocks, I imagine you could just cover the sole with duct tape.

The fabric repels moisture very well!! Also, the tops cinch up tight, so you can get into deep snow, and it won't get inside the booties. It's awesome. I've definitely walked through deep snow drifts and it wasn't a problem. I also shovel my walks in them everyday.

For sizing, read this from one of my male customers:

"The large are a generous one inch longer than my feet (size 10 ½ or 11). That's with a thick wool sock. So, I'd like to return the large booties and keep the mediums."

These are typical WM quality. I would call these more like slippers than booties. Good for trekking around the camp site. NOT good for backpacking/camping since they have a stiff sole. As a result, they do not compress into a small sack.
For use INSIDE your sleeping bag, buy the Flash model, although they don't have much down.
( As an aside, I bought the EXPED brand down booty which compress to soda can size in the waterproof sack included. They are fluffy down but not meant to walk around outside.)
These are really nice, warm and well designed and capable of walking in snow or wet grass etc... Just cumbersome for IN your bag.
Anyway, I have the XL and they'll work up to a size 14 at least!
So, assess your needs, here. Go with the type that works best or buy both! I did and I'm a happy camper (groan)😜

They can be used in a quilt set up for your sleeping system, they can be worn inside your bag, in your car, at camp or around the house. The ten essentials should be changed to 11 to add these bad boys.

I'm getting pretty darn old and have retired from winter backpacking. But I live in a renovated barn with crazy cold floors and just could not figure out how to deal with my freezing cold feet. First tried sheepskin. Still, the cold from the floors crept through. Then I remembered the down booties we used to bring on winter backpacking trips back in the 70's. So went to Mr. Google to look for some. I tried the flash booties first. Sole was too thin and the cold crept through. So I upgraded again to these down booties and WOW !! I finally found my warm feet again. These booties have a much thicker sole and lots more down insulation than the flash. These down booties are great. No more cold feet!! YAY!! I usually wear womens size 8.5 W. The size small in these booties fits just great. I wouldn't have known to order the right size if I hadn't already made a sizing mistake with the Flash. These booties do run large. So great to have warm feet again. Thank You !!

Used these while in Baxter State Park last January and they were one of my top two favorite items for the trip (the other was a Nano Air Hoody). I really looked forward to getting these on at the end of each day, just so darn cozy. Extremely lightweight for how warm they are. When I first got them I was a little concerned about the durability, but they stood up to a decent amount of abuse traipsing around outside going to get water, going to the bathroom, etc. I'm a size 11 in street shoes and the L is perfect for me. I'm looking forward to using them again this winter.

Ultimately choose these over the flash bootie. They have a bit more foam in the footbed and seem a tad more durable all around. The slight weight gain in these is worth it for me for the extra toughness and warmth. There is also more grip with these over the flash booties. My shoe size is a 10.5 so I should ideally fit perfectly in the Large. I didn't find this to be the case, they were too big and felt sloppy because of this. After sizing down I am very happy.

I just got back from snow camping and tried out the new booties. They are really great, especially if you use AT boots. Slipping these babies on after a long day of hiking and building a snow cave was really great. They are durable and warm. The second day cooking breakfast i was too warm in them.

With 800 down fill these booties provide superb heat. I also have a pair of sierra designs which are 800 fill and they just dont have the same warmth that these have. I have been turned on to western mountaineering ever since I tried their down bibs they just don't disappoint. I usually buy a size 10.5 and bought these in a L and they fit great with a winter sock.

So, we snowshoe into our camp, drop our packs and set up for the afternoon. When the sun begins to descend I start unpacking some things to help me stay warm. I pull off my Sorels (which are very warm and comfortable), and slip these on. The moment I had them on I remember thinking, 'These are not going to be warm enough.' I remember feeling a shred of disappointment. Regardless, I bought them so I was going to try them.

We set up dinner on our snow table, kick up our feet, and pour some drinks. It wasn't till about two hours later when I realized I hadn't even thought about my feet that it occurred to me how happy I was with these boots. They are so warm and light you won't even realize they are there. They are absolutely worth the price and space in your pack if you're going to be out in a really cold environment.

The only downside, which is really unavoidable, is that they don't have the best traction, and they fit loosely enough that they can sag around your heel when walking around, as you begin to kind of slip off the insole. Also, as a note on the insole, the bottom of my feet never once even felt a hint of the snow or cold. The insoles in these do a fantastic job of further insulating your feet.

All in all... they are a great purchase for anyone who is going to be doing some backcountry backpacking or camping out in the snow and cold. They'll definitely be in my pack on all my future trips.