The adidas Ultraboost 21 generates a linear energy push system with every step. What this means is that forefoot and midfoot stiffness increases through the stride to provide an extra energy boost at the end of your step.
The temperature independent ultraboost midsole provides huge levels of energy return even as your feet heat up through the run, where some shoes would get softer and less responsive.
A stretchweb outsole made from super grippy continental rubber moves with your footstrike to give a smoother and more flexible ride.
The Primeknit+ upper is highly breathable and moulds to your unique foot shape for a comfortable feel and personalised fit.
• Weight: 340 g
• Midsole drop: 10 mm (heel 30.5 mm / forefoot 20.5 mm)
• Stretchweb outsole with Continental™ Rubber
• Lace closure
• adidas Primeknit+ upper
• Textile lining
• Supportive heel counter
• Boost midsole
Pro:Direct Tennis can offer competitive rates on worldwide delivery, as well as offering a free returns service to our customers in the UK. To check the delivery rates and times to your country click here: