Bought our first set of RUFFWEAR Grip Trex back around 2000. Three Dobermans, one Greyhound, and now our second Standard Poodle we have broken down and ordered our second set of Grip Trex. These boots are terrific. Because of length of toenails (my fault) the toe of a couple of the boots is splitting out, the Velcro doesn’t adhere as well, and the soles are showing there wear. I can’t tell, or even imagine, how many miles these boots have on them, but who cares, these are the best boot, in my opinion, on the market. I am 77 years young. I plan to buy our third set in 2030. I challenge anybody to beat that.