Revealed on January 14, the UltraBOOST 21 is the latest and greatest running sneaker from adidas Running. Made with at least 50 percent recycled Parley Ocean Plastic in the upper, six percent more BOOST in the midsole, a new Torsion bar, floating cage design, PRIMEKNIT+ weave and more, this new models seems to harness everything runners (and sneakerheads) know and love about the UB line, and refine it, master it, and as Sam Handy – the creative director at adidas Running – says, “turbocharge” it to become the best running sneaker in adidas’ roster.

The release of Reebok’s Nano X1 highlights the silhouette’s ambition to offer versatility in the changing fitness market. The shoe includes a number of technology and feature updates, such as a refined toe shape to make the Nano X1 a better fit for more activities. "The Nano X1 is the most refined and versatile iteration of the Nano to date," emphasizes Tal Short, Reebok's senior product manager who led the design of the Nano X1.