Medium Pet Travel Backpack Carrier for Dogs Cat Animal Puppy, Breathable Mesh Net Removable Sherpa Bed Outdoor Carrier f

The parts of the backpack I think should be improved on are the vent windows on the sides and in the front; the windows on the sides have pockets stitched on top of them which prevents air flow if you use the pickets. The front window is too small. Another flaw is the bottom, the bottom is too weak. My dog is a 6 lb 15 yr old chihuahua and in a short time I feel the bottom will start sagging. Other than that the backpack is nice and comfortable on your back with padded shoulder straps with chest and waist adjustable straps, although the chest strap was perfect, it was surprising that it didn't have very much length for adjustment. The waist strap had plenty adjustable length to it. I prefer my dog has more air flow and is comfortable in a sturdy bottom. The price point is worth the backpack. The delivery was quick. It comes packed in a bag not a box. Shipping was free.