Customer Reviews adidas Running Ultraboost 21

They have redesigned the Ultraboost. It doesn’t at all fit like previous years. I ordered a pair and it felt small. So I returned and ordered the next size up, still too tight and uncomfortable. The previous designs were amazing on my feet. These were pure garbage.

I’m a huge fan of Ultraboost 20. These do not fit the same way. The tip is uncomfortable from both below and above the toes. A huge let down. I can feel the end of the insole, even though my toes aren’t at the end of the shoe, and the fabric is reinforced at a weird part where you can feel it on the tops of your toes.

Size 15. Great fit. Initially a bit tight in toe and width.

Everything about the shoes was fine. Shipping fast. Very happy with the style and fit.

These were a bit of an ordeal for me get sized correctly. I'm normally a size 10 in Ultra Boost. Inexplicably, each time I tried on the UB21 in-store, I was a 9.5. Tried them on towards the end of the day each time I visited a store, and was consistently a 9.5. None of the stores I went to had the triple black in stock, so I ended up ordering online. When the 9.5 came in the mail, it was too small. Ordered a replacement size 10, and fit was perfect. No idea what happened here. (I also went through a similar ordeal with the NMD_R1 V2's, before I just gave up and got the UB21's. The UB21's are far more comfortable, btw, just not as nice-looking as the NMD's.)

Too stretchy and not tight enough . The shoe looks good, but it needs to be less stretchy cheap feeling. 2020 was better. Toe box sucks. Color is questionable.

Most comfortable shoe I have ever owned. Definitely my go to work shoe. I have 2 pairs now. I was a ASICS guy, no more. Ultra Boost are great!

This is my second pair of Ultraboosts. I have not worn a more comfortable shoe. I love the materials used.

Ultra boosts are my go to for everyday casual use and these have held up great!

Our son has been wearing adidas ultraboost for several years for running & working out. Each year for his birthday a new pair is always on his wishlist. Another wish granted!

I like the look of these shoes. I did not get them for running. The Solar Red colorway is my favorite color for Adidas. I find these shoes to be extremely comfortable.

I ordered this half a size bigger and it fits great.

Good everyday shoes. Comfortable and stylish.

Originally ordered an 8.5 as a gift (her normal size); however, they were too large. Returned the 8.5 and replaced them with 7.5. The 7.5 was perfect. The Zappos people made this return very, very easy.

A little stiffer than previous versions of the UB line. Toe box is a just a little tight. Otherwise, very comfortable, and better traction than last year’s version too.

Zappos best of the bests shoes in the market best prices…..

A little tight in the arch but broke in quickly. Really comfortable

Very good fit and support!

Very good

As a 10-time Ultraboost owner, the 21’s show real improvement. Not the color combo I wanted but the price was so good. I use them for work as a nurse. I’ve tried all other brands and nothing else is as good

Fit and size was great and it is a versatile shoe…was able to wear to Disney all day without foot fatigue!!