I've gone through a few outdoor mats in my time, and durability is definitely the key factor. The best ones I've found are usually at hardware stores like Home Depot or Lowe's—they carry heavy-duty coir or rubber mats that can withstand years of foot traffic and weather. Online, Amazon has a ton of options, but you gotta check the reviews carefully. I bought a 'Gorilla Grip' mat last year, and it's still looking brand new despite snow, rain, and my dog’s constant digging.
If you want something more stylish, Wayfair and Etsy have great handmade options, though they might not last as long as industrial-grade mats. I’d also recommend checking out local garden centers—sometimes they sell reinforced bamboo or recycled rubber mats that blend durability with aesthetics. Just make sure it has a non-slip backing; nothing worse than a mat that slides around every time you step on it.