Hydro Flask Medium Flex Boot

Item No. 16776-BBM
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Product Description

Add to your Hydro Flask Wide Mouth Water Bottle with the Medium Hydro Flask Flex Boot. Constructed from durable silicone, this flex boot allows you to customize your Hydro Flask bottle while also protecting it against bumps and dings. The medium flex boot fits either 32 oz. or 40 oz. Hydro Flask Wide Mouth water bottles. Keep your Hydro Flask water bottle protected with a Medium Hydro Flask Flex Boot.

  • BPA-free
  • Removable
  • Durable construction to protect Hydro Flask
  • Fits 32 oz. and 40 oz. wide mouth Hydro Flask bottles
  • Weight: 1.6 oz.
  • Material: Silicone
  • Dimensions: 3.5" W x 2" H
  • Manufacturer's lifetime warranty

Customer Reviews

4.2 / 5.0
62 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Worth it!
A Must buy. One bad drop and you have a major dent in your bottle. with this, not so much.
October 22, 2020
1 year ago
Everyone needs this!
July 2, 2020
5 months ago
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.
June 30, 2020
Originally posted at
Must get investment
It fits. Glad I purchased
June 15, 2020
8 months ago
Love it keeps thing so cold and doesn’t leave moisture marks
May 11, 2020
6 months ago
Hydro Flask
This was for my daughter, she absolutely loves it!
May 2, 2020
6 months ago
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!
April 29, 2020
Originally posted at
Cool little add-on -fitment issues on trail series
Does as its designed to do. Just a little heads up I ordered a new wide mouth trail light weight 32oz bottle and the medium boot is to big for it. I have a small on order to try to see if it will fit. will update review once i get it. other than that its a pretty cool add on.
April 28, 2020
Originally posted at
Does not work with 32oz Trail Series
Without thinking about the new TrailSeries being thinner, bought this and discovered it didn’t fit. Worked for another 32oz bottle I had, so I kept it.
April 18, 2020
Originally posted at
Kinda false advertising
Well my boot on my forty oz so far has worked just fine! But... on the other hand the one on my 21 oz not so well I probably dropped it from at maximum a foot and a half off the ground with the boot on and it creates a big dent in the bottom so I don’t know where I stand with them.
March 28, 2020
7 months ago