My husband loves these; they take a lot longer to rip out the knee (he is a licensed Contractor) than the ones without the double knees.

I get these for him all the time and this time I was able to get them for way less ($10.00 less each) than if I went to a local store (who never have his size anyhow and have to order them in for him). And they had his size on Amazon and for a great price.  Which is good, because it takes him about 6 months to get through the knees. And he usually wears them 6 months past that because they are so expensive.

Anyhow, recommended for Construction Workers who do not like to wear knee guards.