MATERIALS--High density transparent acrylic, Oxford fabric, polyester cloth odorless and harmless to pets, in line with health and safety. Dimensions: 32cm/12.6in x 22cm/8.7in x 40cm/15.7in, Weight: 2.9lbs, Weight capacity: 13lbs. BREATHABLE--Oversize breath holes increase the back comfort and breathability, pets can breathe freely. LARGE SPACE--Both sides of the backpack can be expanded through a two-way zipper for easy pet activities; Hard bulging shell can provide enough space for pets to be free and comfortable. DESIGN----Transparent bubble cover fashion design allow your pets to enjoy the scenery and interact with the outside world. USEAGE--A backpack that allows you to bring your pet around you even on the airplane. Fit for Outdoor Travel, Camping, Hiking, Walking, Trekking, Climbing, Fishing, Beach Trip and so on.