Expandable Pet Carrier Backpack for Small Dogs Cats Big Space The pet backpack carrier with expandable back design provides more space for your pet to move around Great Vision Breathable mesh on the front and left & right sides of the bag to maximum air circulation for your pet, without airtight acrylic sheet attach on the backpack Safety Belt Metal zipper with a anti-escape buckle, built-in safety rope to attach to pet's collar prevent pet from escaping Specification Material: 100% Premium Oxford Fabric (without any inferior plastic) Color: Gray, Blue, Black, Green Expand Size: 16.5 x 14 x 24.5 Inch (larger than any others) Not Expand Size: 16.5 x 14 x 11.5 Inch Folded Size: 17 x 13.5 x 3 Inch