I have been needing to buy new carries for my cats for quite a while now. My cats are very large, not fat, they are big cats. One is 12 lbs and the other is almost 14 lbs. They barely fit comfortably in the normal hard carriers meant for cats their size and those carries themselves are so heavy, before even putting my heavy boys inside!I live in California, in an area that has had devastating wildfires in 2020, so thinking about emergency preparedness when it comes to my pets, especially my cats, is very important to me and something that gives me a lot of anxiety.I bought two of these backpacks and I feel so relieved to have them. I appreciate that they fold down flat for easy storage and you just have to zip it up for it to be ready to use. I especially appreciate the shape and large size of the backpack, without even considering the expanding area. It is large enough that my huge cats can sit upright or curl up, without needing the expanded space, which is also an awesome and necessary feature.Then netting on this backpack is very sturdy. I like all the ventilation and that some places can stay covered since one of my cats is scared by his own shadow and the least he can see when he has to be in his carrier, the better.The straps on this backpack are very sturdy, which will make it easier to carry, especially with my heavy boys inside. I also appreciate the chest strap for added support.It took me a long time to choose these carries and I'm really happy with these purchases. I feel so much less anxiety knowing I at least have the right carriers in case of an emergency.