We tested these in west Texas. They are very tough and made of double thick Cordura with heavy Velcro closures. Complete set includes two pair. Recommended for light to medium rocks and brush. Not recommended for snow and ice. Small fits dogs 10-30 pounds Medium fits dogs 30-45 pounds Large fits dogs 50-70 pounds Extra Large dogs fits 70-105 pounds .
I have used these boots for several years in Western Oklahoma primarily for protection against sand burrs. They wear well under our conditions; sandy soil and generally dry terrain. They will wear out but I can usually get about a seasons worth of hunting out of them. I use them on fairly big running pointers and GSPs. Easy to install; I use a preliminary wrap of Vet-wrap and secure them with black electrical tape.
If conditions are wet or if the dogs are running in and out of water they can come off but for the drier conditions we experience here in Oklahoma they work very well.