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What is PWRRUN foam? Saucony's cushioning explained

The short answer: PWRRUN is Saucony's proprietary cushioning foam — an engineered EVA-based formulation designed to balance cushion and energy return. It absorbs impact on landing and returns energy on push-off.

What makes PWRRUN different from standard EVA

Standard EVA foam cushions impact well but is relatively passive — it absorbs energy without returning much. PWRRUN's formulation is engineered to be more responsive — compressing on impact and rebounding more actively. The result is a shoe that cushions without feeling dead.

The PWRRUN family

FoamUsed inCharacter
PWRRUNRide, GuideBalanced cushion and response
PWRRUN+TriumphSofter, more cushioned
PWRRUN PBEndorphin Speed, ProRacing — maximum response

How to protect PWRRUN

PWRRUN foam degrades with heat and machine washing. Never tumble dry or machine wash Saucony shoes. Air dry only.

Verdict
PWRRUN is a well-regarded foam formulation. Its balance of cushion and response is why the Ride is consistently recommended as a versatile daily trainer.
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Source: Saucony foam technology from saucony.com.