The men’s and women’s versions of the Pegasus 36 have the same air bag density. According to Nike, women want a softer riding shoe hence the difference in air bag densities. The men’s version of the Pegasus 37 also has a firmer, 20 PSI Zoom Air bag compared to a softer, 15 PSI air bag in the women’s version. This difference in thickness means that the Pegasus 37 has more “pop” on toe-off than the Pegasus 36. The forefoot Zoom Air bag in the Pegasus 37 has a 10mm thick bag compared to the full-length 4mm thick Zoom Air unit in the Pegasus 36. When it comes to rides, the Pegasus 37 rides softer than the Pegasus 36 and is more responsive. The Pegasus 37 midsole is topped off with a forefoot-only Zoom Air bag. The Pegasus 37 has Nike’s newer React foam which they call one of their “most complete” foams. The Pegasus 36 has a traditional EVA foam midsole called Cushlon with a full-length Zoom Air unit on top of its midsole.

The main difference between the Pegasus 37 and the Pegasus 36 is their midsoles.

Nike air zoom pegasus 37 size 9.5