I spend 8-10 hrs a day on my feet,on a concrete surface and these shoes have made a world of difference on my knees. The cushioning is incredible, the non-slip tread is the best i have ever found. I have worn work boots that cost in the range of $200.00-$300.00 and not been impressed nearly as much as i am with these shoes. I already own a second pair for everyday wear. Truly feel like I got my moneys worth!