Brooks Glycerin 22 vs Glycerin 23

The Brooks Glycerin 23 features a few important updates to the Brooks Glycerin 22. The 23 iteration has reduced the heel-to-toe drop, and there's more cushioning under the forefoot. Both shoes still primarily cater to heel strikers, but the Glycerin 23's forefoot holds up better over long distances and doesn't bottom out as quickly as the Glycerin 22. Another significant change is the triple jacquard mesh upper of the Glycerin 23, which gives a more flexible and secure fit, but is quite thick and could make the shoe hotter in the summer months.