This sling is very durable and the wide strap is very comfortable across my shoulder. I have a 3 lb MinPin/Chihuahua who loves to be carted around in it. It's way too big for him, but I hook his collar to the lobster clasp at the front of the sling (great safety precaution) and he sits more towards the front on a folded-up blanket. It's great for being hands free, and worked great at the farmers market and around the house. He may get a little too hot in it during hot days, though. It may be too much sling for chihuahuas and yorkies, I'm still waiting for something a little more simple and something that holds him closer to my chest, but it's safe and it works well.