WOMEN'S 860 v14 Size:6.5 Glycerin 21: The Glycerin 21

Glycerin 21: The Glycerin 21 further refined the engineered mesh upper

The Fresh Foam X 880v14 is an evolution in everyday reliability

The GTS 22 was well-regarded for its reliable cushioning that worked well across various distances and running intensities

Here's a detailed comparison to help you understand the key differences:

WOMEN'S 860 v14 Size:6.5 Glycerin 21: The Glycerin 21Description Built for reliability over the long haul and sustained comfort over all distances, the 860 is a true go to shoe. The Fresh Foam X 860v14 combines innovative Stability Plane technology with the pinnacle underfoot cushioning experience of Fresh Foam X. Features Fresh Foam X midsole foam with approximately 3% bio based content delivers our most cushioned Fresh Foam experience for incredible comfort. Stability Plane provides performance and