Medium Flex Boot
$5.96
Regular Price $7.95

Medium Flex Boot

Medium Flex Boot is rated 4.2 out of 5 by 89.
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$5.96
Regular Price $7.95
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 have a friend with flexible measuring tape measure the distance between your C7 vertebra and the imaginary line between your thumbs. That’s your torso measurement. If you are between pack sizes, go with the smaller size.

  2. 2. Hip Measurement

    While 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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Colorful protection.

Make your Hydro Flask your own with a colorful, durable silicone Flex Boot. Customize your look and protect against bumps and dings.

Medium boot fits 32 and 40 oz wide mouth bottles.

If your bottle is smaller than 32 oz, 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 wide mouth bottles
  • Medium boot is not compatible with 32 oz Lightweight Wide Mouth Trail Series bottles
  • BPA-Free
  • Lifetime Warranty
Technology
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Lifetime Warranty
Lifetime Warranty

We stand behind our products.

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

Wide Mouth Compatible
Wide Mouth Compatible

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 organizations focused 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 donated donated.
  • 26,043 Bottles donated bottles.
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Reviews
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
Rated 5 out of 5 by from hydros I bought mine a few years ago and it still dorks great!
Date published: 2019-09-21
Rated 5 out of 5 by from Awesome! I love this so much! It’s such an incredible feature!
Date published: 2019-09-17
Rated 5 out of 5 by from Great product Bought this boot for my daughter and she loves it very much.
Date published: 2019-08-25
Rated 5 out of 5 by from Keeps flask from sliding Love the boot! Bought 2 cobalt boots, mine matches the cobalt Hydroflask, the other looks great with the glacier blue flask. As other reviewers have stated, these help keep the noise level down. Also helps keep the Hydroflask upright in my tote bag , and keeps it from rolling out of the cupholder in my car. Great purchase, glad we got them!
Date published: 2019-08-04
Rated 5 out of 5 by from A Must Have.. The flex boot is a must have for any Hydroflask it protects I have a flex boot on all my Hydroflask! Price is Great, small price to pay to protect your Hydroflask bottle! :)
Date published: 2019-08-02
Rated 5 out of 5 by from Great material Great fit. Like the protection it provides the bottom of the bottle.
Date published: 2019-08-01
Rated 5 out of 5 by from Great Protection! I bought this almost a month ago and I’m so glad I did! I haven’t dented my bottle at all so it’s doing it’s job!
Date published: 2019-07-28
Rated 5 out of 5 by from I love my Hydroflask boot. I love my Hydroflask boot. It keeps my hydroflask from denting and it make it quieter when I set it down.
Date published: 2019-06-12
Rated 5 out of 5 by from Fills a Need Ended up damaging the bottom of my original bottle. Not sure how it happened actually. This boot protects the bottom of the bottle and allows it to stand upright easily. Only complaint is that it does add some girth to the bottle which makes it more difficult to slide in and out of my back pack sleeve. I assumed this would be the case though and was a trade off I was fine with. Material feels durable and fits snug on the bottle.
Date published: 2019-06-10
Rated 5 out of 5 by from super cute I didn't realize how great this would prefer my life! The bottle is so much quieter which you don't realize how annoying it is until you get a boot. Plus looks super cute and fun.
Date published: 2019-06-08
Rated 5 out of 5 by from Great idea I bought it for work so I wouldn’t have to worry too much if I drop it! Love it
Date published: 2019-06-05
Rated 5 out of 5 by from Works very well It keeps my hydroflask from denting and it make it quieter when I set it down. I just wish they had more color options so I could buy them for my other hydro flasks
Date published: 2019-05-23
Rated 5 out of 5 by from Covers dents well I bought this a month ago to cover up the dent in my hydro flask that I got not even a week after I bought it. It works very well it’s self, but the bottle is very disappointing that it can be so easily dented especially for how costly it is. I wish I could say this product will last me because it works well just very disappointing.
Date published: 2019-04-07
Rated 5 out of 5 by from Finally! I had asked about these a long time ago. Great for reducing clanging noise when setting it down and dents when dropping it!
Date published: 2019-04-01
Rated 5 out of 5 by from THE BEST ACCESSORY OMG this is so so so great, highly recommend! You can actually set your cup down without making any noise!
Date published: 2019-03-29
Rated 5 out of 5 by from Great Addition This boot is absolutely great. I have the 40oz bottle and the boot fits perfectly. The boot keeps the bottle from making noise when you set it down and it protects the bottom of the bottle. The rubber itself is pretty sturdy. It isn't going to bust if you drop your bottle. I would definitely recommend buying this product.
Date published: 2019-03-08
Rated 5 out of 5 by from Must Have Accessory I would recommend buying with 32 oz bottle. It helps with keeping the product from sliding around on smooth surfaces.
Date published: 2019-03-04
Rated 5 out of 5 by from Great Product Product was exactly as described. Bought it for my Hawaii shaved ice Hydroflask and matches perfectly.
Date published: 2019-02-28
Rated 5 out of 5 by from wish it had lilac... They have very nice color options,but only if it could match with the bottle.Other than that it's an amazing product.
Date published: 2019-02-14
Rated 5 out of 5 by from Best thing I've ever bought i got a hydro flask for christmas and i scratched the bottom so i got a boot and it hasnt scratched since it looks so cool and fresh with my hydro and now im a swaggy sister also its super quiet in school and i can sneak cherry dr pepper into school when they only let us have water so ya rate 10/10 so dope
Date published: 2019-02-11
Rated 5 out of 5 by from Loved it Loved the protection and silence it provided. Only had it for two days before someone stole my flask from practice.
Date published: 2019-02-09
Rated 5 out of 5 by from Cheap yet effective - what more can you ask for? So glad Hydro Flask makes these! It’s like having a protective case for your expensive phone. I got a special edition 40oz raspberry/lava bottle on my recent trip to Hawaii and the cobalt medium flex boot fits perfectly and adds a nice contrast. I use this bottle a lot at work and before I got the flex boot I would always have to gently place my bottle on a coaster or paper towel to make sure it doesn’t get scratched/dented. Now I can finally place it down normally - thank you Hydro Flask!
Date published: 2018-12-27
Rated 5 out of 5 by from Definitely worth it!! I just got this for Christmas to go along with my hydro flask, it works great to keep the bottom of the bottle protected and to keep it dent free. Not only does it add protection, but it adds style too!
Date published: 2018-12-25
Rated 5 out of 5 by from Love it I bought the flex boots to add on as a first and I love them. It protects the bottom from damage and it quiets the sound of the bottle hitting the table when put down. Also looks very sleek.
Date published: 2018-12-16
Rated 5 out of 5 by from Great product The Hydro flex boot keeps my bottle from getting dents.
Date published: 2018-12-12
Rated 5 out of 5 by from Saved My Water Bottles Life I bought this with my 40 oz White hydro-flask. I bought the black boot so it adds really good contrast to the white bottle. I have dropped this many times with it all the way full and it doesn't DENT! I was very impressed. Another great thing about the boot is that it's a cheap accessory for your hydro-flask. But before when I would set down my hydro flask it would make a loud noise but now with the boot it basically makes no noise.
Date published: 2018-10-31
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Questions

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

Dose it fit the 40oz water bottle?

Asked by: Jess20
Yes
Answered by: Consumer Service
Date published: 2020-03-17

Can i return this item?

Asked by: Mia1234567890
Please contact customer service at 888-584-9376 to discuss this further.
Answered by: Consumer Service
Date published: 2020-03-17

What boot color do you recommend for the 32 oz limited edition Mai Tai bottle?

Asked by: rose327
It depends on your personal preference. Black or cobalt would be the two best choices.
Answered by: Consumer Service
Date published: 2020-03-17

I purchased the Ombré blue/green for my grandchild.  Can someone recommend a color to purchase  for the flex boot? Thanks 

Asked by: Smiley
Please contact customer service at 888-584-9376 to discuss this further.
Answered by: Consumer Service
Date published: 2020-06-25

I was thinking about getting a hyrdroflask in the color, Frost. Since it is a light color, will getting a boot discolor or ruin the color of the bottle?

Asked by: Em_ducret
No, it should not discolor the bottle.
Answered by: Consumer Service
Date published: 2019-10-27

Wich boot will fit 20oz coffe and 16oz coffe

Asked by: Polie22
The small boot will fit the 20oz and 16oz flasks.
Answered by: Consumer Service
Date published: 2019-10-27

does this fit on the 32oz

Asked by: mimi357
Yes, the medium boot will fit the 32oz and the 40oz flasks.
Answered by: Consumer Service
Date published: 2019-10-27

What boot color would look the best on the frost hydro flask?

Asked by: Megan2639
While it is a personal preference, both the black and the cobalt boot look great with the frost flask!
Answered by: Consumer Service
Date published: 2019-10-27

I have a navy blue hydro flask. Will the navy blue boot be a perfect match in color? 

Asked by: Tajh27
Comparing them side by side, they are very close to a perfect match!
Answered by: Consumer Service
Date published: 2019-10-27

What color would go with lilac?

Asked by: Xoxokenzie
While it is a personal preference, both the black and the cobalt boot look great with the lilac flask!
Answered by: Consumer Service
Date published: 2019-10-27

Are the flex boots latex free?

Asked by: xoxla
The flex boots are made of silicone.
Answered by: Consumer Service
Date published: 2019-10-25

what size boot would fit a 32 oz wide mouth?

Asked by: ljlakegirl
Medium size boot.
Answered by: riley45
Date published: 2019-10-23

What size boot fits on the 18oz wide mouth bottle??

Asked by: Kailee
the small size
Answered by: karen452
Date published: 2019-07-03

Will the medium flex boot fit the food flask?

Asked by: Emoore03
No it will not, it is too big.
Answered by: customer servcie
Date published: 2018-11-23

does the boot fit the 10oz spirits cup?

Asked by: gk_allday
The small boot while not made for this item, will fit the rocks flask.
Answered by: customer servcie
Date published: 2018-04-03

Will this fit the 32 oz tumbler?

Asked by: swatson
The medium sized boot will not fit the 32oz tumbler. While the small sized bottle boot was not made for this item, it will fit but is more snug against the flask.
Answered by: customer servcie
Date published: 2019-04-22

What color would look the best on the lemon 32 oz?

Asked by: kaitlynfoley4
Personally, I like the black boot on the Lemon flask. But it is a personal choice.
Answered by: customer servcie
Date published: 2018-07-18

Does the flamingo straw lid match the hue of the flamingo boot?

Asked by: Jolie15
They are a little off. The materials used to make the caps and the boots are different, so the colors are off a little. The boot is a little darker than the cap.
Answered by: customer servcie
Date published: 2019-01-24

Would this boot fit a 40 oz hydro?

Asked by: Larli
Yes, the medium boot is for the 40 oz flask.
Answered by: Hydro Flask Customer Team
Date published: 2019-05-10

does it fit on the 12 oz food flask?

Asked by: MtnDewStew
No. The food flasks are not really meant to have the boots. The base of the food flask is a little different than our other bottles.
Answered by: Hydro Flask Customer Team
Date published: 2018-02-05

Does the boot have the "Hydro Flask" on it?

Asked by: JP10
The boot does say Hydro Flask.
Answered by: Hydro Flask Customer Team
Date published: 2018-05-14

Does it fit the 32 oz growler? 

Asked by: Yleilani
Yes! Funny story though, the 32oz growler is about .2 centimeters less in diameter than a wide mouth 32oz flask. The boot will fit but it could feel slightly lose but not lose enough to fall off or anything.
Answered by: Hydro Flask Customer Team
Date published: 2019-09-01

Which boot fits the 20 oz wide mouth? (It’s one of the coffee ones with a flip lid)

Asked by: Zippy19
The small boot would be the one to fit.
Answered by: Hydro Flask Customer Team
Date published: 2018-09-30

I havea raspberry colored 32 ounce bottle. what color boot would look good

Asked by: cyndi66
That would be a personal preference. Personally, I think any of them except the Flamingo would look good.
Answered by: Hydro Flask Customer Team
Date published: 2018-03-06
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Hydro Flask supports non-profit organizations focused 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 donated donated.
  • 26,043 Bottles donated bottles.