The only thing that I noticed was that on the right shoe it has a Brooks insole that's black and on the left shoe it says cushion neutral, but the insoles seem to be the same size as the shoes and fit well I just don't know if that's a Brooks insole on the left shoe. These shoes are an absolutely amazing condition. The Brooks goes 14 empowers a flexible yet structured fit, with one 100 percent DNA loft cushioning to enhance seamless transitions and segmented crash pads creating an even smoother flow from landing to tow off. The upper employs strategic placement of the 3D fit print technology at both the heel and saddle for a breathable yet secure fit. The shoes feature: an updated midsole cushioning 3D fit print, segmented crash pad, plush transition zone,100 % DNA loft cushioning.The shoes have many 5 star ratings on multiple sites Please see inside shoe label (if available) for additional information. This is a final sale, this is a no return, no refund sale.