As a high-cushioned neutral running shoe, the Brooks Glycerin 21 will make you feel like you’re floating with every stride. Nitrogen-infused DNA LOFT v3 foam is improved over the previous Glycerin's cushioning, and, since it's lighter, Brooks was able to add 2mm more foam.
If you're looking for a new high-cushioned shoe but need more support for your flat feet, we'd recommend looking at the Brooks Glycerin GTS 21 here.
