Another thing I like about this shoe is the comfortable mesh upper, it keeps your foot feeling cozy yet secure. The 15th version of the Ghost has a new, DNA Loft v2 midsole which makes the shoe a little bit heavier and gives it a firmer ride.

The laces are very adjustable, and the upper is slightly stretchy so the shoe can adapt to many different types of feet. The fit, for us, was true to size and we found the Glycerine 18 was comfortable as soon as you put them on. The primary reason we're so stoked about them is that they excel at the stability task, but sacrifice very little in the way of speed.The Brooks Glycerin 19’s upper uses 3D Fit Printto provide a comfortable and secure foot lockdown while letting the foot breathe, especially when it’s hot outside. The Glycerin is a daily trainer, and for an experienced runner, the ride will feel a little bit slow on faster runs. The fit dials in just right in the forefoot and midfoot while maintaining breathability and comfort. However, this technology works behind the scenes—it’s not something that users noticed excessively throughout a run, which is rare enough to be mentioned as most support medial posts tend to be quite perceptible.

According to Des, the Glycerin don’t “bring anything fancy to the table because that’s your job, but it’s never going to take away from your run. At The Runner’s World Shoe Summit back in November (days before the New York City Marathon), a Brooks rep holding the 18 in his hands said what could be regarded as the Glycerin’s slogan: “More comfort means faster running. This decreases the lifespan of the outsole, disrupts the traction slightly, and just feels gross underfoot. That feel transfers perfectly to the ride, offering one of the most enjoyable shoe experiences you're likely to find during training sessions.The midsole is made of DNA Loft, a soft midsole compound that mixes rubber, EVA foam, and air to deliver a comfy underfoot feel. The DNA LOFT midsole is fairly dense and might even feel stiff to some runners, though it still has a lot of compression in the heel.