Not sure about the longevity, but I've been wearing these for a few weeks now and at the price of just under £8 on Amazon they're a bargain hiking pant and suit my needs. I also have a pair of Craghoppers at 4 times the price and can't see that they're 4 times better
FCO Mens Casual Cargo Pants Shorts Trousers Cotton Hiking Walking Outdoor Fishing- Brown Colour Only