These Chacos are nothing like my beloved late-90s Chaco Geckos, and thats actually a good thing. Not sure how long itll hold up for. HOWEVER i can wear and walk in the size 9 due to the strap around the ankle. Sending it back Makes life a lot easier carrying them around and safe with a very durable case. He wears a 9. We use these to tie down our kayaks to the cars roof top rack, fore and aft. A great feature is the volume control to easily adjust the volume and a microphone that he can move to adjust the sounds output. Unfortunate. They must have assembled it incorrectly because this thing is stout!