Durable shoes. Months and months later shoes fit like day 1. Shoes broke in perfectly but never lost it's shape like many other name brand shoes. Nike running shoes stretch out so much when I run 12-15 miles every day. Mizunos help me extend my daily distance by 2-3miles extra every day. Now I run further more comfortably. No knee pains or back pains I got when I was wearing Nikes.