Brooks Glycerin 20 vs Brooks Aurora-BL: Two Takes on Nitro-Infused Foam

Introduction

The Brooks Glycerin has always been the brand’s comfort-first daily trainer, but the 20th version arrives with more hype than any previous iteration. The reason is simple: Brooks overhauled the midsole, swapping in a nitro-infused DNA Loft v3, the same foam family that debuted last year in the Aurora-BL from the brand’s forward-thinking Blue Line Lab.

That makes this an interesting comparison. The Aurora-BL looked unusual, surprised nearly everyone, and became a favorite among runners who took a chance on it. Now that its foam has trickled into the more traditional Glycerin line, it is worth looking at how the two shoes deliver that same material in very different packages.

Brooks Glycerin 20: A Familiar Name with a New Foam

The Glycerin 20 keeps the classic geometry you expect from the line, including the familiar 10 millimeter drop. The big change sits underneath. The midsole is now nitro-infused DNA Loft v3, not the DNA Flash found in the racing shoes, and the result is a ride that many found bouncy, light, and responsive.

The upper uses an engineered air mesh with decent padding through the tongue and collar, so step-in comfort is genuinely good. The last is a little wider than before, with extra platform width that appears aimed at stability and smoother transitions through the stride. For runners with wider feet, that extra room can be welcome, though some found the forefoot a touch too spacious.

Ride and Feel: Nitro-Infused DNA Loft v3

On the run, the DNA Loft v3 foam delivers a soft, cushy ride with a noticeable bounce. If you simply want a straightforward trainer with plenty of cushion and comfort, this shoe should keep you happy for a long time, since the generous rubber coverage suggests strong durability.

There are trade-offs, though. The substantial rubber outsole coverage adds weight and can mute some of the light, bouncy feel that makes this foam exciting. And while the fit is comfortable at step-in, the roomier platform may leave some runners without a fully secured midfoot, which is worth checking on a test run before committing.

How the Aurora-BL Compares

The Aurora-BL remains a fascinating shoe. Its decoupled heel and huge stack of foam made for a smooth transition and a genuinely fun ride, all at a claimed weight of roughly eight and a half ounces for men’s sizing. For many, it was the best Brooks shoe of its release year.

Runners who loved the Aurora-BL did not always get that same sensation from the Glycerin 20. The Glycerin carries more rubber coverage, which can dampen some of the bounce, and the Aurora-BL’s decoupled heel gave it a smoother, more polished transition. The Glycerin, however, is the more traditional and durable option, which matters if you plan to rack up serious daily miles in it.

Weights, Pricing, and Verdict

The Glycerin 20 weighs 8.8 ounces (250 grams) in a women’s size 7.5, which is fairly standard for a daily trainer, and 11.2 ounces (317 grams) in a men’s size 10.5, which leans heavy given the lightweight midsole, largely because of the extensive rubber outsole. It carries a $160 price tag.

As a verdict, the Glycerin 20 lands in good-but-not-great territory for some testers, particularly those who experienced fit issues on longer runs. That said, it is not a worse shoe than its predecessor, and the direction is clearly positive. Anyone who has enjoyed the Glycerin in the past will likely appreciate the foam upgrade, and runners seeking a soft, cushioned everyday trainer have an easy reason to take a look.

Conclusion

Brooks is moving the Glycerin line in the right direction. The nitro-infused DNA Loft v3 midsole finally brings a modern, bouncy feel to a traditional cushioned trainer, while the Aurora-BL still holds the crown for the most exciting ride in the lineup. Choose the Glycerin 20 if you want a durable, comfortable daily trainer with a fresh foam underfoot, and consider the Aurora-BL if you want the lighter, smoother, more experimental experience that made this foam famous in the first place.