The Mizuno Wave Inspire now comes in two versions. FIrst we have the update to the orginal that features an all-new upper consisting of engineered mesh and an internal toe cap for a sleeker look. SmoothRide Support Wave technology in the midsole provides the ideal balance between cushion and stability in both versions. The second version of the new Wave Inspire features a Waveknit upper that is flexible and more adaptive. The engineered mesh provides a bit more volume in the shoe and is generally more secure. If you require a wide shoe, the regular engineered mesh version of the Inspire comes in a D for women and a 2E for men. If you are after a more adaptive fit, check out the Waveknit version.