The 'Vaporfly' esque heel provides a smooth transitions thanks to the new large bevel in the rearfoot. The full React sole provides a bouncy ride no matter where you land. The sole of the Nike Zoom Pegasus 37 has been completely updated with full React and a double sized Zoom Air unit in the forefoot. While the lace lock does help, it does take time to get use to what I would consider a sloppy rearfoot fit. However despite this design, the heel is still not secure and I could feel my heel lifting. Again, the forefoot fits slightly wide to average with average to narrow in the midfoot and heel. This also did not work well with the short tongue and I had more pressure across the front of my ankle (anterior talocrural joint) than I would have liked. This unfortunately does not lock the heel in well and I had to lace lock the shoe firmly. The heel is odd as the heel collar is extremely low with a strongly elevated Achilles heel tab. There is a split tongue that fits nicely around the ankle, but is short. The midfoot is locked down extremely well thanks to hidden bands in the upper (hidden flywire?) and the laces lock the upper in well here.

The forefoot fits average to slightly wide, but feels snug thanks to the shallow part mentioned previously. The upper of the Pegasus 37 has changed to a translucent mesh that feels thick at first but disappears once you start running. This feeling goes away on the run, but those that are sensitive to this may want a half size up. The Pegasus 37 fits slightly short in my normal size 10 due to the shallow upper in the forefoot.

Zappos nike air zoom pegasus 37