Prototype after prototype. Innovation after innovation. Testing after testing. Meet us in the hot pursuit of the pinnacle harmonization of weight, cushioning, and responsiveness. Ultraboost 21. Say hello to incredible energy return. Sock-like fit Lace closure adidas Primeknit+ upper Textile lining Supportive heel counter Boost midsole Weight: 340 g Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm) Stretchweb outsole with Continental Rubber Primeblue Color: Grey Two/Grey Two/Screaming Orange FY0397
Prototype after prototype. Innovation after innovation. Testing after testing. Meet us in the hot pursuit of the pinnacle harmonization of weight, cushioning, and responsiveness. Ultraboost 21. Say hello to incredible energy return. Sock-like fit Lace closure adidas Primeknit+ upper Textile lining Supportive heel counter Boost midsole Weight: 340 g Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm) Stretchweb outsole with Continental Rubber Primeblue Color: Grey Two/Grey Two/Screaming Orange FY0397
Prototype after prototype. Innovation after innovation. Testing after testing. Meet us in the hot pursuit of the pinnacle harmonization of weight, cushioning, and responsiveness. Ultraboost 21. Say hello to incredible energy return. Sock-like fit Lace closure adidas Primeknit+ upper Textile lining Supportive heel counter Boost midsole Weight: 340 g Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm) Stretchweb outsole with Continental Rubber Primeblue Color: Grey Two/Grey Two/Screaming Orange FY0397
Prototype after prototype. Innovation after innovation. Testing after testing. Meet us in the hot pursuit of the pinnacle harmonization of weight, cushioning, and responsiveness. Ultraboost 21. Say hello to incredible energy return. Sock-like fit Lace closure adidas Primeknit+ upper Textile lining Supportive heel counter Boost midsole Weight: 340 g Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm) Stretchweb outsole with Continental Rubber Primeblue Color: Grey Two/Grey Two/Screaming Orange FY0397
Last updated at 07/14/2025 22:10:31
originally posted on myntra.com
Great fit. Just had to order a size larger. The boost are good for running and long distance travel too. Definitely recommended. However the heel part is narrow in the shoe. So people need to adjust to it.
originally posted on stockx.com
Bought these as a gift. They look great. We're in perfect condition. We are very satisfied with our purchase. Will definitely continue to buy from StockX.
originally posted on nordstrom.com
Great fit overall especially for wider feet. The lace cage does not cut into the feet like previous models. Neutral stability throughout. Cushioning is on the stiffer side which makes it great for working out. The only flaw, it needs more forefoot cushioning and padding. The forefoot is so thin you can almost feel the ground.
Great fit. Just had to order a size larger. The boost are good for running and long distance travel too. Definitely recommended. However the heel part is narrow in the shoe. So people need to adjust to it.
Bought these as a gift. They look great. We're in perfect condition. We are very satisfied with our purchase. Will definitely continue to buy from StockX.
Great fit overall especially for wider feet. The lace cage does not cut into the feet like previous models. Neutral stability throughout. Cushioning is on the stiffer side which makes it great for working out. The only flaw, it needs more forefoot cushioning and padding. The forefoot is so thin you can almost feel the ground.
I was hesitant in ordering since i was the first to review.ordered march 18th, received today march 20ththe shoes were 50% off compared to any other site so i took a chance.THE SHOES ARE GREAT
I really liked the Ultraboost 20s and bought 2 pairs of the Ultraboost 21 to add in my rotation. I work out 4-5 days a week, doing cardio and weights. And these feel really good on my feet. I am not an avid runner, but as advertised, the additional boost feels more responsive and more cushioned. If you liked the Ultraboost 20s, you'll like the upgrade on the Ultraboost 21s. I am a heavy set guy, I've lost over 60 lbs in the last year, and have put my Ultraboosts through the test...
I'm a marathon runner and have used Ultraboost for past 5 years. This new "light" version delivers the amazing cushioning and support that I've come to expect from Ultraboost and they are also considerably lighter, so all the better. I'm ordering my second pair of these shoes today as I continue preparing to BQ at for Calif Int Marathon this fall.
I'm a fan of ultra boost tech, have had every model and decided to buy this one on sale. When it first arrived I was super excited to try them on. Out the box, my first impression was that it seemed to follow previous models and was made from solid materials, once on foot my feelings changed. Super comfortable, light weight but LONG. Mens size 8 looked more like a 10. The silhouette was more like a clown shoe paired with a huge heel and I just couldn't keep them.
I've been in Adidas Solar Glides for 7+ years now. When my favorite shoe was retired, I decided to try the Ultra Boost Light. The cushion on the Ultra Boost was far superior to the Solar Glide and offered amazing comfort and stability during my runs. The problem I encountered was the eyestay (the plastic material surrounding the shoelace eyelet at the top of the shoe). It dug into my the top part of my feet, causing pain and discomfort. I have narrow feet, so I tried loosely tying the shoes. I even tried different socks and tested the shoes on a treadmill and outside. After 7 test runs, I had to return these do the pain they caused. Overall, it was a great shoe for the cushion, but not a fit for my feet.
