Adizero Boston 13

Lost a chunk of foam from the toe area.

“The Boston 13s are way less significant than this and I still lost a chunk of foam from the toe area.”

Three runs in: still firm, and their legs felt more beaten up after a 16 km run.

“I have these too, pretty much the exact same experience I have 3 runs on mine the last being a 16km run at 4.57 per km pace.”

First 12 km: soft, breathable upper, stable and propulsive, but legs don't stay fresh as long and the laces are short.

“Upper is soft and breathable, keeping feet comfortable and dry.”