US size numbering The Ride's "360º fit" makes them fit like a... glove. Their 8 mm drop helps even casual runners project their strength forwards. The Ride's "360º fit" makes them fit like a... glove. Compared to the previous version, this version 17 adds PWRRUN+ cushion on top of the PWRRUN midsole, pushing the shoe's levels of cushion to luxurious levels. This has brought 3 mm of added thickness to the structure. The manufacturer recommends this shoe for high volume training. In addition the upper is made of a more breathable material. - Wide fit - For a neutral stride - The midsole's PWRRUN foam is slightly softer than other EVA foams, but still has a good running feel - Thanks to the FORMFIT construction, the shoes fit snugly around the entire insole - The surface mesh fabric is stiff and flexible in just the right places, which improves both fit and running comfort - Height of base 35 mm, height of tip 27 mm, drop 8 mm - The TRIFLEX outsole has a very flexible structure