adidas Ultra Boost 21 - Blue - Black - 8.5
Best current price£239.00from Joom
Best offers
Shopping.co.uk recommended and popular offers
Joom£239.00Visit shop Adidas Men's Blue/Black Ultraboost 21 Crew Navy Sneakers Core- Fy0350 Cm
Visit shopJoom£239.00Visit shop All Offers
3 offers from £239.00 - £298.00
View price history by clicking the chart icon.
JoomAdidas Men's Blue/Black Ultraboost 21 Crew Navy Sneakers Core- Fy0350 Cm
£3.00 delivery
£239.00
Visit shop
Adidas Men's Blue Ultraboost 21 'Crew Navy' Fy0350£15.00 delivery£298.00Visit shop →
Product Information
Full details
The adidas Ultra Boost 21 is a high-performance trainer designed for adult male runners and active individuals seeking a perfect blend of comfort, style, and energy return. Featuring advanced adaptive cushioning, it provides a smooth, responsive ride for daily training or casual urban wear; however, its specialized foam construction may feel slightly heavier than minimalist racing flats.
All features
| Age Group | adult |
|---|---|
| Colour | Blue |
| Gender | Male |
| Shoe Size UK | 8.5 |
| Accent Colour | Black |
| Shoe Type | Trainers |
| Series | Ultra Boost 21 |
| Brand | adidas |
Extended Product Information
FAQs
Are these shoes suitable for marathons?
Yes, the cushioning system is specifically designed to provide comfort and energy return over long distances.
Can I use these for gym workouts?
They are great for cardio and treadmill use, though they are primarily optimized for running rather than heavy weightlifting.
How do I determine the right size?
This model follows standard adult UK sizing; if you prefer extra room for running, some users prefer sizing up by half a size.
How often should I replace these trainers?
It is generally recommended to replace running shoes every 300 to 500 miles, depending on usage intensity and surface.
Are they machine washable?
No, machine washing can damage the adhesive and cushioning materials. Stick to manual cleaning with a cloth.
Troubleshooting
Foot feels too tight
Adjust the lacing system to allow for more volume across the midfoot.
Excessive dirt on white midsole
Use a soft-bristled brush and a small amount of mild detergent to gently scrub the white Boost material.
Pros and Cons
Pros
- High energy return from the Boost midsole
- Excellent long-distance comfort
- Durable construction for daily use
- Versatile design suitable for gym or street
Cons
- Slightly heavier than performance racing shoes
- Limited color variation compared to basic models
- Not intended for technical trail running
Setup, Compatibility & Care
To ensure your trainers last, follow these maintenance practices: Always undo the laces fully before removing the shoes to prevent heel collapse. If the shoes become wet, air dry them naturally away from direct heat sources like radiators, which can warp the cushioning foam. For cleaning, wipe down the exterior with a damp cloth and mild soap; avoid machine washing or heavy soaking to protect the integrity of the materials. Keep them in a cool, dry environment when not in use.