This is an awesome winter coat! I have an 80 pound Lab Hound mix and it wasn't easy finding a coat to fit him. I bought a 2XL and it fits really well. The outside is like a wind breaker type material and inside is super super soft and snuggly. It gets pretty cold here, at least to me it is. I don't usually take my dog for walks when it's below 30 degrees because I worry he'll be cold. The coldest we've gone for a walk with this coat is 20 degrees and it seems to keep him pretty warm. I think I got cold before he did! This coat is also great because it has buckles and doesn't have those velcro straps that eventually don't stick anymore. It also has a zipper on the back that you can unzip from both the top and the bottom to find the perfect opening if they wear a harness. Once you're leash is hooked you can zip it back up to keep the cold out. His last coat had just a hole and it wasn't where the loop to his harness was so his coat was always bunched up. It's definitely waterproof too. The one day he went into our pond up to his chest to get a drink of water and came out soaking wet. It's about a 10 minute walk home from our pond. I usually take his coat off once he's inside but I could hear sloshing so I undressed him outside. I unbuckled the coat and a TON of water came out! I was shocked since we had walked so far and figured it would of drained. It's kinda funny because when I first put the coat on him I thought the chest strap looked kinda like a diaper because it's kinda puffy how it goes between his front legs. I thought it was really funny that it held the water almost like it was a diaper haha I can't really comment on durability since I've only had it a month. It does seem like it could rip easily though if it got snagged on a branch or something sharp. Overall I think it's a great coat and I'll probably buy another one when this one gets old.