My boys are 4 and 6, and they love mud boots. But the cheap ones we usually buy don't last very long, plus they never fit well. These boots are super tough. The rubber is thick and it feels very durable. These have a deep tread for better traction in the rain and mud. They fit so much better than the cheaper kids boots too. They taper near the ankle and the mid foot which seems to hold the boot on when they're walking. I highly recommend these.