The Rio Runner is a modern take on the classic Mexico 66. It shares some heritage cues with the 66 such as: The low rise sole, cross band on the heel, the heel tab, and a T-toe.

But there's also newer technology infused in the shoe such as the soft gummy sole which gives it a fairly cushy stride for its thickness. Softer than the Mexico 66 and on par with the Ultimate 81 while still having a classic profile. The black rubber pieces on the sole are abrasive contact patches for added traction. It could use a few more of these on the outside edge. Also the heel tab isn't reversible like the 66 and probably wouldn't last long if used often. The tongue is thin, lightly padded and out of the way, but has open vent holes that would expose you to water. Its also really light, lighter than the 81s (my mainstay).

On the style side it has a few things that wouldn't be noticed unless you looked up close. The stripes have a cool mini hexagon pattern on it, the body has a synthetic suede in a waffle pattern, and the contrasting colors of the shoe work well without being garish. Its fresh while still having that old school Onitsuka minimalism.

A person should find the fit in line with other Onitsuka products, but I doubt it would break in as well as their other canvas and leather shoes.