These are my go-to booties for my service dog when the pavement becomes too hot or when I need to protect his feet from used needles, broken glass, or other urban hazards. My previous service dog's Grip Trex lasted 7 years' worth of scorching summers and year-round hazards, so they certainly last. The bottoms are a lot more hardy than the Hi & Light shoes that I have (which I also use and like), so I grab the Grip Trex for hot pavement and the Hi & Light for warmer-than-ideal pavement. I also like that there is reflectivity on these Grip Trex, which some styles don't have. One MAJOR drawback for me is that the Grip Trex DON'T have the size imprinted on the bottom of them like Ruffwear's other styles have. I hope that future versions include the size, because it makes it very easy to use if your dog has two different sized boots. (pro tip: buy two separate colors for the two separate sizes, and this will save you time and frustration for figuring out which is which). I have also found that this style makes my dog's feet sweatier than the Hi & Light. Both styles have their uses.