What is Midsole lifespan?
Kilometres before the foam is dead.
Short answer
Track your kilometres, not the shoe's appearance.
Midsole lifespan when buying a running shoes
Kilometres before the foam is dead.
Why it matters: Most trainers last 500–800 km; after that cushioning is gone even if the upper looks fine.
Look for: Track your kilometres, not the shoe's appearance.
Full Running Shoes buying guide