PUMA Eternity NITRO: a stable, cushioned daily trainer

PUMA broke back into the competitive running scene in 2021 with an innovative NITRO lineup. It includes five models that range from daily trainers to elite-level race shoes.

PUMA Eternity Nitro cushioning

The Eternity takes up the niche of easy, daily runs with a touch of stability for overpronation. It can be described as a stable version of PUMA Velocity NITRO.

Helps with mild to moderate overpronation

Acting similarly to Brooks GuideRails, Puma's RUNGUIDE creates bumpers on the sides to help the foot roll straight through the gait cycle. Unlike stability shoes of old, it offers more subtle support that can even be used by neutral runners on their recovery days.

Contributing to the overall stability is the noticeably wider footprint of the sole which creates a stable base for the runner's foot.

PUMA Eternity Nitro arch support

Bouncy cushioning of the Eternity NITRO

Underneath the firmer RUNGUIDE is a softer layer of nitrogen-infused Super Critical foam. Built with similar properties as Skechers Hyperburst, it shows higher levels of energy return than standard EVA. As one expert pointed out, if the entire midsole was made of this foam, the shoe would feel like running "on a bounce castle."

PUMA Eternity Nitro bouncy

Enhanced lockdown

With OptFit straps stretching from the midsole to the top on both sides, you get even stronger lateral support when the laces are tightened. Runners haven't reported any discomfort, heel slippage, or the need to cinch down the laces as they felt very secure and locked in.

What's more, an expert says that the upper "gives off a premium trainer vibe" and describes the in-shoe feel as "soft and accommodating."

PUMA Eternity Nitro lockdown

Reliable grip

Runners who tested this PUMA shoe on surfaces like wet pavement, wooden bridges, and brick roads report that the outsole traction performed admirably. In addition, those who have covered at least 50 miles in the shoe say that the rubber shows not one bit of wear.

Lighter than most stability shoes

The Eternity NITRO from PUMA presents an impressive support-to-weight ratio. AT 273 g per shoe, it is 8% lighter than stability running shoes on average.

PUMA Eternity NITRO is adapted to women's feet

The women's version is designed with a lower instep, narrower heel, and other small details that create a more tailored fit.

PUMA Eternity Nitro fit

Other shoes in the NITRO series

Facts / Specs

Terrain: Road
Weight: Men 9.6oz / Women 7.9oz
Drop: Men 7mm
Arch support: Stability
Pronation: Overpronation
Arch type: Low arch
Use: Walking, All-day wear / Jogging

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Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.