My 5-year old son is tough on clothes and almost all his pants have holes in the knees.  So I decided to splurge ($35) on these pants hoping they would hold up better... they didn't.  He's had them for 2 months and already has worn through the knees.  I expected more from Carhartt and am disappointed.  They're also big in the waist so we ordered a size down (they are adjustable inside so made them as small as possible so they won't fall down), but now they are getting too short.  I was debating between giving them 2 stars because they only lasted a few months for us, but gave them 3 stars because my son loves them (mostly because they look just like daddy's).  I wish they'd reinforce the knees better and make them a bit longer.