Classified as a cushioned trainer, the Brooks Glycerin 14 is designed for the neutral runner. The Glycerin 14, which boasts 28.5mm of Super BioMoGo DNA under heel rivals the notoriously maximal cushioning of Hoka One’s lineup. Brook’s new Super BioMoGo DNA, which they state provides 20% more cushioning then the previous BioMoGo DNA, assures a springy, yet cushioned ride. Noticeable grooves span the length of the foot bed allowing for a more flexible midsole than the Ghost 9 or Hoka Clifton 3. A newly updated stretch TPU cage and 3D stretch print overlay eliminates stitching and glue leading to a secure-fitting and comfortable upper. 

Comfort
As expected from a cushioned trainer, the Glycerin 14 scores well in comfort. The updated Super DNA tends to be softer than others tested, but made for a pleasant run. The dual midsole absorbs and collapses perfectly with each foot strike. The newly updated upper is one of the more comfortable uppers tested due to its light and pleasantly airy stretch TPU cage and new 3D print overlay.

Fit
Those with medium to narrow feet will find the Brooks Glycerin 14 a great fit, however runners with wide feet may find the Glycerin 14 to be a tad tight. Lacing up was quite easy because of the 3D stretch print overlay and TPU cage, which provided a secure and comfortable fit. Plenty of plush material line the heel and ankle collar to prevent any irritating hot spots.

Responsiveness
The Glycerin 14 was highly responsive, making each stride effortless and smooth. The updated Super BioMoGo DNA, which provides 20% more cushioning then the previous BioMoGo DNA is definitely on the softer side but doesn’t seem to sap too much energy from each footstrike. Heavier runners may find they collapse the midsole more than their lighter counterparts, thus reducing how much pop they experience.

Speed
The Brooks Glycerin 14 is a surprisingly fast shoe for 10.6oz, however, a firmer midsole would have made for a faster shoe. The Super BioMoGo DNA is quite soft, which decreases the force needed to get a good push-off. Grooves running along the length of the footpad allow for more flexibility making it very easy to get up on your toes and really push off. This is not a shoe for the track but as one tester noted, “a pretty good all purpose shoe if you are looking for one trainer.”

Ride Quality
The Glycerin 14 is certainly a smooth riding shoe. The flex grooves allow for a more natural heel-to-toe transition. While the DNA foam is soft, it did absorb impact nicely, however, it seems to get softer as the miles add up, which degrades ride quality as the shoe ages.