There was never much difference in terms of the prices of the trail running shoes of the time period and thats because all were pretty well stacked in terms of features. The Air Terra Adaptable wasn’t much off from the Air Terra Humara and 15 dollars cheaper. However, there was no water resistant mesh uppers or G-Tek traction (at least it wasn’t stated in the catalog) and that might explain the original MSRP of 75.00. Take a trip back below!