Medium Flex Boot
Medium Flex Boot is rated 4.2 out of 5 by 84.
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£8.00

Medium Flex Boot

Medium Flex Boot is rated 4.2 out of 5 by 84.
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£8.00
Size Chart
Hydro Flask Pack Size Chart
Available Sizes S/M M/L
Torso
Measurement
18 - 19 in 19 - 22 in
43 - 48 cm 48 - 56 cm
Hip
Measurement
22 – 46 in 26 – 46 in
56 – 117 cm 66 – 117 cm
  1. 1. Torso Measurement

    • A. Bring your chin to your chest and feel for the most prominent bony bump where the slope of your shoulders meets the back of your neck. This is your C7 vertebra and the top of your torso measurement.

    • B. On each side of your body, feel for the top of your hip bones, just below the sides of your ribs. With fingers pointing forward and thumbs pointing backward, draw an imaginary line between your thumbs. This is the bottom of your torso measurement.

    • C. Stand up straight and ask a friend to measure the distance between your C7 vertebra and the imaginary line between your thumbs using a flexible measuring tape. That’s your torso measurement. If you are between pack sizes, go with the smaller size.

  2. 2. Hip Measurement

    Although your torso measurement is the best indicator of your pack size, it’s still important to check your hip size when using a hipbelt. To find your hip measurement, wrap a flexible tape measure around the top of your hip bones, just below the sides of your ribs. This measurement is slightly higher than your waistline

Medium Flex Boot | Hydro Flask
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Colourful protection

Make your Hydro Flask your own with a colourful, durable silicone Flex Boot. Customise your look and protect against bumps and dents.

Medium boot fits 32 and 40 oz (946 and 1,183 ml) wide mouth bottles.

If your bottle is smaller than 32 oz (946 ml), check out the Small Flex Boot here.

Product Benefits

  • Removable, silicone boot adds extra protection to your Hydro Flask
  • Medium boot fits 32 and 40 oz (946 and 1,183 ml) wide mouth bottles
  • BPA-Free
  • Lifetime Warranty
Technology
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We have great faith in our products

Hydro Flask guarantees this product with a limited lifetime warranty against manufacturer defects.

Mix and match

Compatible with all Wide Mouth products for ultimate versatility.

Let's Go!

Today is wide open. You lead, we'll follow.

#HeyLetsGo

Hydro Flask supports non-profit organisations focusing on building, maintaining, restoring and providing better access to parks. Since 2017, we have been doing just that:

  • 92 Non-profits supported non-profits.
  • $1.5 million Dollars (approx. £1.197 million) donated donated.
  • 26,043 Bottles donated bottles.
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Reviews
Rated 5 out of 5 by from Do the job ! Fits perfect and protects the bottom of my hydroflask like a champ
Date published: 2020-10-19
Rated 5 out of 5 by from A quality product! The quality of this product is outstanding. It help keeps my bottle safe, and the surfaces clear of dents and dings.
Date published: 2020-09-08
Rated 5 out of 5 by from Love it This is great. Protects the flask from scratching, doesn’t slide.
Date published: 2020-08-19
Rated 5 out of 5 by from I love it !! I love that you don’t have to worry about my hydro flask to tipping over with the boot is secure.
Date published: 2020-07-27
Rated 5 out of 5 by from Love it, but one critique I bought this as soon as I replaced my previous Hydro Flask, which was dented from not owning the Flex Boot. I love this boot! My bottle, which I have owned for 6 months now, has not been dented once due to this boot. My only wish is that there were more color options, especially if there were matching colors to each color bottle.
Date published: 2020-06-30
Rated 5 out of 5 by from Great product This product helps maintain my water bottle stable and not get all dinged up.
Date published: 2020-06-13
Rated 5 out of 5 by from I LOVE IT This boot has come in handy more times than I can ding
Date published: 2020-05-21
Rated 5 out of 5 by from Great insurance policy. I bought the boot a month ago and wish I had bought it sooner. Totally protects my flask. Highly recommend.
Date published: 2020-05-20
Rated 5 out of 5 by from Highly recommend I've had two hydroflasks in the past 3 years, and I got a flex boot for my most recent (which I've had for a year or so). I was hesitant at first, as I didn't know if it was truly necessary, but I'm glad I did. It prevents the normal annoying clanging sound when placing it on a table, and also prevents it from sliding around. The main reason I bought it is because I go on a lot of runs and put my bottle down on rough rocks and roads almost daily. And the boot has protected it from all scratches and dents. You should definitely get it!
Date published: 2020-04-29
Rated 5 out of 5 by from Super cute add on that has a purpose I love my hydroflask. I got the 32 oz watermelon color one and got the yellow boot with it and I adore the color combo. The boot definitely is a great add on for working out, in the car traveling and on desks. It keeps the bottle from moving. It is very sturdy and does not stain!
Date published: 2020-03-21
Rated 5 out of 5 by from Keeps everything super cold! I bought a 32 oz. hydro flask a couple weeks ago and I’m so happy with it. It keeps my water super cold and it’s the perfect size for me I usually only have to refill once everyday. There is one downside though it is quite easy to dent or scratch them I one at the bottom from dropping it on my hardwood floor. But otherwise I would overall recommend this product.
Date published: 2020-03-19
Rated 5 out of 5 by from Great addition I love love this new addition. No loud banging sounds every time I knock it against something.
Date published: 2020-02-07
Rated 5 out of 5 by from Amazing and super cute I bought this a few weeks back . And I love it ! It keeps my hydro from tipping over , moving around, and protects the bottom from getting scratched . And it’s a beautiful color . My son too had a kids hydro and those come with boots and he hasn’t tipped it over not once.
Date published: 2020-02-03
Rated 5 out of 5 by from Snug Fit The boot fits great and doesn’t slide around or dismount. It’s extremely easy to clean.
Date published: 2020-01-20
Rated 5 out of 5 by from Rad This is a awesome idea. The bottle of bottles like this always get dinged up. It’ll keep that coating nice and clean for years to come
Date published: 2019-12-05
Rated 5 out of 5 by from Perfect fit and functionality Fits perfectly Love the color match Little hole in base for drainage Keeps the bottle and other things from getting scratched.
Date published: 2019-11-24
Rated 5 out of 5 by from It's great! Does what it's supposed to. I was tired of too many dents along the bottom edge of my hydro flask, so this boot is great for preventing that.
Date published: 2019-11-21
Rated 5 out of 5 by from Hello I bought this a month ago and I’m so glad I did because this boot helps my water bottle not get dented
Date published: 2019-11-10
Rated 5 out of 5 by from Very great!!! I bought this two months ago and it has saved my hydro I’ve dropped it and that boot saves it
Date published: 2019-10-22
Rated 5 out of 5 by from Works awesome I bought this and ever since then I’ve not had a dent I dropped it but never did it
Date published: 2019-10-14
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Questions

I’m really clumsy and have already dropped my Hydro flask... whoops. The bottom dented and it doesn’t stand flat anymore. I’m wondering if this boot will even it out (keep it from wiggling), or just protect it from further dents?

Asked by: Bree
My son bought a boot for his just for this purpose and yes, it stabilized his bottle even better than when new. The “grippy-ness” this provides keeps it from scooting or tipping easily, protects from future dents and the bonus is it seems to make it a bit more quiet and even slightly help insulate (hubby is an electrician and noticed that when he has to set down on particularly hot pavement of any kind, this helped his Hydro perform like it did when working inside - works fine without the boot & still stays cold... he’s just noticed that on hot surfaces more ice would melt than normal, but not after adding this). 
Answered by: Jenyfurrr
Date published: 2020-08-30

Do the current boots fit the new curvature of the bottom of the new bottles (with the longer necks?).

Asked by: jackie020
I saw a similar question elsewhere that they said yes, it fits the new shape. Someone else had asked if they were going to redesign or release a new version for those and Customer Service said there are no plans to add/redesign because these fit the new design. 
Answered by: Jenyfurrr
Date published: 2020-08-30

which boot fits the 16oz tumbler?

Asked by: ShellyB
The Small Bottle Boot fits all 12-24 oz wide & standard mouth flasks. So this one will fit the 16 oz Tumbler. The Medium Bottle Boot fits the 32 & 40 oz wide mouth flasks; besides the 32 oz Trail Series.
Answered by: Consumer Service
Date published: 2020-04-26

will this fit the new "32 oz Lightweight Wide Mouth Trail Series" bottle?

Asked by: billgates
Unfortunately, we do not currently have a bottle boot to fit this size and style bottle.
Answered by: Consumer Service
Date published: 2020-07-05

I really like the new color, fog. Would a stone color flex boot look good with this, or should I just go with black. I am thinking stone because I like more lighter colors, but not too bright. Thank you!

Asked by: Beckbird3
The Fog color is a very pale purple/blue color; almost like a periwinkle color. Yes, Stone or Black would look good with it. If you purchase either one and find that the color does not work for you, you are able to return the item within 30 days of receipt for a refund; as long as items are unused and in their original packaging.
Answered by: Consumer Service
Date published: 2020-06-16

Has the medium boot been updated to reflect the newly-redesigned (as of early Jan 2020), more rounded shape of the base of the 32oz wide-mouth flask?

Asked by: DRock83
We are not redesigning the boots because they will still fit the new bottles.
Answered by: Consumer Service
Date published: 2020-06-24

Is there a dark-blue color medium boot if so pls tell me!!!!

Asked by: Sky8
They are currently out of stock. You may check your local dealers to see if they have them available. Otherwise, we offer email notifications to keep you updated on everything Hydro Flask. To sign up, simply enter your email address in the field at the bottom of the home page.
Answered by: Consumer Service
Date published: 2020-03-17

Does this fit the 18 oz food flask?

Asked by: dian07
None of the bottle boots fit on our Food Flasks.
Answered by: Consumer Service
Date published: 2020-04-26
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Hydro Flask supports non-profit organisations focusing on building, maintaining, restoring and providing better access to parks. Since 2017, we have been doing just that:

  • 92 Non-profits supported non-profits.
  • $1.5 million Dollars (approx. £1.197 million) donated donated.
  • 26,043 Bottles donated bottles.