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Western Mountaineering Flash Down Bootie - Men's


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    27 Reviews


    Reward your feet after a day of roughing it.

    There is nothing better than slipping out of your hiking, mountaineering, or ski boots and into a pair of lightweight Western Mountaineering Men's Flash Booties at the end of the day. These babies are packed with warm goose down insulation to help thaw out cold feet and give them some good ol' TLC. The Flash Bootie is primarily intended for use indoors, in your tent, or even in your sleeping bag, but a reinforced sole does allow for quick trip to the groover before bed.

    • Lightweight, packable booties for backpacking and mountaineering
    • Lofty 850-fill down is compressible, warm, and ultralight
    • Ripstop nylon fabric balances strength with weight
    • Reinforced sole and rand increases overall durability
    • Foam insole offers additional warmth and cushion to footbed
    • Item #WES0053

    Tech Specs

    [rand and outsole] 70D nylon, [upper] 12D ripstop nylon
    850-fill down
    1/4in EV50 foam
    Claimed Weight
    [single] 1.5oz
    Recommended Use
    backpacking, winter camping, mountaineering
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Lightweight and feet saving

      These are awesome for cold camping nights. They are super lightweight and can compact down to a small size. Western Mountaineering does awesome with their products and making them feel high quality. The look of these are a little goofy but they do their job well. For sure not made to walk around in and they don't have a solid sole to them but they keep your feet nice and toasty.

      Hey Stephanie, Thank you for the review. The Western Down Bootie (not the Flash Bootie) is the one that has a more robust sole to be able to be used outside the tent; The Flash Bootie is best for use in the hut, the cabin, or just around the house! Enjoy!

      Western Mountaineering Rep

      Perfect for Yurts or Winter Camping

      • Height: 5'9"
      • Weight: 150lbs

      I bought these for a yurt trip and am glad I did. From the minute you put them on, you can tell that the down is premium and your feet instantly start to warm.

      I recommend this for inside use pretty much exclusively. WM makes some burlier pairs that would be great for quick trips to grab wood or hit the outhouse.

      I did notice that the footbed of the bootie liked to move around a bit. I would sometimes have 1/4 of my foot off the padded footbed. I took a star off for that but otherwise these were all I could ask for and more!

      As far as sizing goes, I wear a 9.5 shoe, 25.5 ski boot and purchased a size small. Small was the right choice.

      Western Mountaineering=great, these=ok

      • Familiarity: I've put it through the wringer
      • Size Bought: Large
      • Height: 5'9"
      • Weight: 165lbs

      I probably bought these for the wrong application. I bought them for a teahouse/lodge slipper for the Three Pass Trek in Nepal. I found them to be plush and warm, but not to have adequate soles for my application. Another major plus for them is how light weight they are. That was a large driver for me as well as I was trying to pack real light. They do look a little ridiculous, kind of like clown shoes, but that didn't bother me. I still wore them, especially because it was nice to get out of my boots each day after many miles of hiking (14 days in a row). Western Mountaineering makes super high-quality products, and these are no different, just think about the application you want them for and whether they make sense for you or not. I wear a men’s 10.5 in running shoes and hiking boots and bought a large in this product. It fit pretty well but I did find that my foot would shift towards the center, somewhat off the sole as I walked. This is probably a pre-existing supination/pronation issue I imagine as this product is just a flat sole, no arch support (did not expect any).

      Cold feet

        I took these to Manistee Nat'l Forest on December 11, 2017 to use around camp, after a day of backpackiing. Almost as soon as my feet hit the ground in them, they started getting cold. I presume that the down would have kept my feet warm, except that the soles are so thin that within a few minutes the temperature of the ground and the temperature of my feet began to reach an equilibrium which was far from agreeable. I'm sure that they kept the soles thin to keep down the weight. As such, I don't really know for what these booties are useful except perhaps as house slippers.

        It seems like a normal thing for you to feel cold when your feet hit the ground in these soft booties. I've read that down doesn't work well when it is compressed(which it is when you are standing on them). I wouldn't call your experience the intention of this product. These booties are not slippers but rather intended as sleeping devices in cold temps.

        these things are GIANT

        • Familiarity: I returned this product before using it
        • Fit: Runs large

        According to the size chart, I was thinking an XS would fit just fine. NOPE. They were pretty huge. I imagine they would nice for #thatvanlife or keeping your toes warm while camping, but they are a little big for the person I was getting them for. I wish they were smaller! That being said, they are super, duper warm and would be nice and cozy on a camping trip.

        A must for van living

        • Familiarity: I've put it through the wringer

        I have spent a considerable amount of time living out of my van, and as all van lifers know, cold floors are inevitable. Even when it is a toasty 72 in my campervan, the floors remain icy. Enter the flash bootie. These things are my saviors on cold january mornings. I slip them on and enjoy warm feet while preparing for the day of skiing. Classic Western Mountaineering quality and warmth. They are definitely not for walking outside, although I suppose in a pinch I have stepped outside in them before. Move up to the next model if you intend to walk around camp with these on. I purchased the ultralight model because they are so light and packable that you can wear them in a sleeping bag if you need to. For shuffling around the van or yurts as others have mentioned, these are perfect, but definitely seriously consider your intended use before purchasing these. All of that being said, I am happy to have toasty feet all winter long with my Flash Booties.


        • Familiarity: I've used it several times
        • Fit: Runs large
        • Size Bought: Medium
        • Height: 6'0"
        • Weight: 185lbs

        Got these for my first yurt trip (Snorkeling Elk Yurt in the Tushar Mountains near Beaver, UT) - my feet were warm and cozy all weekend, except for when I stepped on a particularly hard and somewhat sharp piece of snow/ice (the soles, while providing decent grip, do not provide much protection). The booties held up great to quick trips outside to use the restroom. Only complaint is that they do run large and are a bit sloppy to walk on. But I'm pretty sure I had the coziest feet of anyone else on the trip. I have a size 10 foot and the Medium fit fine (even had room to spare).

        I agree. I have these booties and love them, but they do run large. I wear an 8-9 in US sizes, and find that I am swimming in the mediums. I've had my pair for almost two years, but wish I had smalls, or maybe even XS.


        • Height: 5'10"
        • Weight: 175lbs

        Picked these up, they are like furnaces for your feet. Great for those trips that you need to go light. Might recommend something else if you're on your feet a bunch as these might be a little fragile.

        Hey Jason, as long as the user realizes that the materials here are designed to make the lightest weight bootie and are not focused on durability, I think they will be good. Too often, I find that customers who want something so light and packable also want it to be used in more abusive situations... but there is a definite trade off. These are perfect for in the tent and yurt. Not perfect for finding firewood out in the woods.

        Thank you for the review and the comment!

        Western Mountaineering Rep

        Booties Rockin Err Whurr.

        • Familiarity: I've used it several times
        • Fit: Runs large
        • Height: 5'3"
        • Weight: 110lbs

        I bought these as a gift for my husband and this is what he had to say :

        "Slippers are one of those things that you begrudgingly pack for a yurt or camping trip because packing them along seems so excessive... but not these bad boys. They pack down so well that they could fit into any nook or cranny in your pack. And they're light enough that if you pack one fewer beer and include these then you'll be saving weight (leave no beer behind though).

        Cinch down the ankle strap and they'll warm up before you can say "Hot digits!"

        Read through the tag that's attached to them and it'll encourage you to inspect every seam... which I did because I'm a sucker for craftsmanship (and knowing what I paid for) and sure enough they're impeccably sewn. Western Mountaineering kept it simple but didn't skimp on the details of the fabric and the down, so they're freaky light and the ripstop fabric is holding up really well so far. The sole has enough foam to insulate the bottom of your feet from the cold ground, too.

        From van life, to too cheap to turn the heat, or even bad circulation life, or yurt life these booties are the jam-- so cinch down that ankle, open up that extra beer and get those feet warm, you have a big day ahead of you tomorrow."

        He's typically a size 9 / 9.5 in men's and purchased a Medium and they fit perfectly.

        Like personal ovens for your feet

        • Familiarity: I've used it several times
        • Fit: True to size
        • Height: 6'3"

        These things are toasty!! Pack these in your bag to toss on after you get back to camp, and your feet will thank you. 1 thing I want to add is they are a little wonky to walk in at first. Do yourself a favor and pick some up!!


        • Familiarity: I've used it several times
        • Fit: Runs large
        • Height: 6'0"
        • Weight: 215lbs

        Wore these in below freezing temps on frozen ground and snow and was comfortable. They were nice for poking around at the fire, late night wee wee, and making meals around camp. I even wore them in my sleeping bag with no problems.

        They are light, warm, and packable.

        I did tend to slip to the sides of the soles; so the soles ended up on the sides of my feet. Once I got used to them it wasn't a problem.

        If you plan on tromping around camp a lot, get one of their more solid pairs.

        These are meant more for chilling and minor walking around.

        I recommend these.

        Pros: warm, super cozy, light, packable

        Cons:can be slippery and awkward at first


        Josh - Great review! Thank you! And you are right on with the soles - not designed for snow and ice use... go with the bigger "Down Bootie" for that, vs the Flash. Huts, camp in tent, or at home - these booties are a dream!

        Western Mountaineering Rep

        Warm and Toasty

        • Familiarity: I've used it once or twice and have initial impressions
        • Fit: True to size
        • Size Bought: small
        • Height: 5'10"
        • Weight: 135lbs

        Intro: I bought these because I have chronically cold feet when camping. They would also work well around the house.

        Pros: Extremely lightweight, easily compressible, very warm. I put them in my stuff sack with my sleeping bag.

        Cons: Would be nice if they had a more substantial sole so that I could walk freely around camp without worrying about tearing them.

        Fit: I wear a women's size 8 (US). I bought a size small and they fit perfectly. My friend who wears a women's 9 can also comfortably wear these in a size small.

        Hey Cheryl! Thank you for the review! These are great for the light duty circumstances you describe. We DO have a more durable outsole, if that is what you would like, on the next bootie up from this - the Down Bootie. Your trade off is that it's not quite as light weight, but it's great for around camp.

        Enjoy -

        Western Mountaineering Rep

        down booties

        • Familiarity: I've put it through the wringer
        • Fit: Runs large

        Why do you make them so big ??? Using them for slippers and also for sleeping when I'm with cold feet, I could almost get both feet in each slipper. Size aside, you make a great quality product. ( I'd pay extra for a proper fitting pair)

        So warm!

        • Familiarity: I've used it once or twice and have initial impressions
        • Fit: Runs large
        • Size Bought: small
        • Height: 5'8"
        • Weight: 135lbs

        These warm your feet up instantly. It's very awesome. The sizing is not the same, as the chart. I got the Small, and had a guy with 9-9.5 feet try them on. He said they fit fine, and maybe even had a little extra. I am female, with 8.5-9.0 feet. These are a bit roomy, but like others have said, I'm okay with it. I walk fine in them. They are new for me, so I don't have a longevity report, yet. Just stoked to finely have stoked feet!!

        Also, they roll up pretty tiny, and will stuff down well in your stuff sack. I don't recommend stuffing them in loosely , though. It will bend the sole, if you smash them wrong.

        So warm!

        Western Mountaineering Flash Bootie Mens

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

        Pricey product, but does what is supposed to do. I am getting to the point were doubling up on the socks isn't quite cutting it on the colder nights. I have used camping two nights with temps in the upper 20's / lower 30's with snow on the ground and very windy. I actually had to unzip the 0-degree sleeping bag to let some cooler air in a couple of times through the night. It's amazing how warm feet make the rest of the body feel warmer! Definitely NOT an outdoor use product and will only hold up for in the home or inside the tent use only. Clearly not a fashion statement item (think Ronald McDonald shoes that will fill up that empty space in your sleeping bag's foot box!) They run large in size. I have the Men's L and wear size 10W boots. Width wise, they fit great without giving that 'packed or stuffed' feeling of compression on my feet. You hardly know that you are wearing them. Length wise, they are slightly long. But I don't walk around in them. For comparison, I loaned them to a friend w/ size 14 regular shoes and he said they fit comfortably. Neither of us walked around in them to determine 'slip and slide.' They weigh nearly nothing and can pack down to the size of a small grapefruit for the pair. But I think stuffing them in the pack behind the sleeping bag will work best (the soles have a foam padding structure that lends them to being compressed flat vs. rolled up.) I would purchase again. If you suffer from cold feet, you will thank yourself for treating yourself to these booties!

        Thanks for the review, Steven. These booties are definitely for indoor / tent usage, and maybe around camp with light use and no ice or snow. We have other booties for more outdoor / expedition use, but these are more light duty / hut / cabin / etc.

        Thanks for taking the time to write!

        Western Mountaineering Rep

        Western Mountaineering Flash Bootie

        • Familiarity: I've used it once or twice and have initial impressions
        • Fit: Runs large
        • Size Bought: medium
        • Height: 5'7"
        • Weight: 155lbs

        Run a tad large, but if your wearing them in your bag.... who cares. 1st time backpacking in the snow and I was toasty as can be. What a great addition to my gear and they add next to nothing in weight.

        Hey Shirley, Leta with Western Mountaineering here. What shoe size are you? I am a women's 9 and I fit into the unisex medium ok... I am wondering if we can do better on our sizing chart. Anyway, these booties do kick some ass - I've used mine in the hut, at home, and around the campsite - amazing warmth and almost no weight!!
        Thanks for the review,


        I agree with Shirley, these run large. The chart is off by about 2 sizes. I wish I read these reviews before buying.

        I wear a Mens Size 8, 41.5 euro. I bought two sets, one small for my wife and a medium for me. I fit perfect in the size small. In fact, I can actually stick my Croc Size 8 shoe inside of the Medium bootie. That makes it fit better when walking outside at snow camp. I actually cannot walk around in the Medium bootie by itself without it sloshing all over the place.

        Perfect for inside the bag, but for $70 I want to wear these at snow camp and not have to rely on bringing Crocs or some other footwear in addition to mountaineering boots and booties.

        I think these booties could use an upgraded lightweight firm foam sole that is foot shaped like the Croc (but 1/2 the thickness on the sole and no upper). Closed-cell foam is warm, light and moldable. This would be more durable compared to the current foam sole with fabric outer cover.

        Me Likie

          These are great! I bought them for hanging around camp and sleeping in while ski mountaineering. I am a cold sleeper to begin with and even in a 0 degree bag my feet will get cold. Not any more :) These are comfy to wear and especially sleep in. Your foot does slide around in them a little while walking around but I do not move around too much in them anyway while I have them on. They are super lightweight and not noticeable when stuffed in the bottom of my pack. The only thing is they are made in the large side. I am a straight up men's 10 shoe size and the medium fits me well. There is even about an extra inch or so of space. If I had gotten the large they definitely would have been way too big.

          I wear a Mens 8 1/2, occasionally size 9....

          I wear a Mens 8 1/2, occasionally size 9. Would the "Medium" be tight? Would the "Large" be too loose?

          I wear a size 9.5-10 and just got the large and they are huge. I have more than an inch and a half to move around in. I'm going to swap them for mediums. I'm not sure if I would go with a medium or small if I were you but I'd say that medium you'd definitely have room.

          -- edit--

          I'm noticing a discrepency between the EU sizing and US sizing on their sizing chart and I feel like the EU sizing is definitely more accurate to what I got so I would recommend going with that.