Our 1.5 year old GSP lives in Vermont and goes on daily hikes in the mountains for 1-3hrs every day. When the snow on the ground freezes he needs boots. We tried another brand that was primarily soft fabric – those boots not only came off and filled with snow, but he ripped them to shreds running around on the very first hike. We were resistant to spending $100 on boots for our dog. But these were well worth the cost. They fit perfectly, stay on his feet, and keep the snow out. They do not slow him down. He's worn them every day for a week straight and they still look new. Furthermore they protect his nails from the elements. He's clearly happy and relieved. Before these boots he would walk slowly with difficulty through snow. Now he's zooming around in all his glory. Highly recommend for the adventurous off-leash dog.