FREE DELIVERY & HASSLE FREE RETURNS on all UK Mainland website orders
FREE DELIVERY & HASSLE FREE RETURNS on all UK Mainland orders
Adidas UltraBoost 21 Women’s Running Shoe – Core Black/Core Black/Grey Four
The Adidas UltraBoost 21 Women’s Running Shoe is the latest in a long line to use boost™ technology. With no EVA, the midsole is entirely constructed from boost™, giving you the ultimate in cushioning and energy return. The new Torsion System provides a 15% increase in forefoot bending stiffness for a much more responsive run. The shoe is made with Primeblue, a high-performance recycled material made in part with Parley Ocean Plastic. 50% of the upper is textile, 75% of the textile is Primeblue yaStretchweb also compliments this by allowing boost™ to move and adapt, expanding with the foot and with no restrictions. The heel counter is softer and opened up slightly around the achilles for a more natural feel and movement, but without compromising on its support.
- 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
Our returns policy is simple. If for any reason you are not satisfied with your purchase we will be happy to refund or exchange it for you. Returns are FREE for UK customers using a pre-paid Royal Mail label which is emailed to you by our customer service team when completing the online returns form. Please Note we are unable to refund any postage costs if you choose to return by any other method. Please be sure to send to the following address:
The Running Outlet
54 Palace Street,
The following size chart is a guide to adidas clothing and footwear sizes with a comparison to European and US sizes.
Please note that the onus is on the customer to choose the correct size and that all size charts are a suggested guide to measurements based on information supplied from the manufacturer.
If you’re in between sizes: for a tight fitting, go for the smaller size OR for a looser fit, then go up a size.
Men’s Shoe Sizing
|EU||40 2/3||41 1/3||42||42 2/3||43 1/3||44||44 2/3||45 1/3||46||46 2/3||47 1/3||48 2/3|
Women’s Shoe Sizing
|EU||36 2/3||37 1/3||38||38 2/3||39 1/3||40||40 2/3||41 1/3||42||42 2/3||43 1/3||44|
Junior Shoe Sizing (including Spikes)
Men’s Shirts and Tops Sizing
Men’s Bottoms Sizing
Women’s Shirts and Tops Sizing
Women’s Bottoms Sizing
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