Transparent and Breathable: With a mesh all around you can see your pets at all times and ensure the ventilation of the playground. Automatic opening: No complicated splicing built-in frame opens in seconds. Folds up when not in use for easy storage. Keep away from children and faces when opening under spring pressure. Outdoor/Indoor: Pet sports enclosures are easy to carry eliminating the need to carry huge cages when you go out with pets. May restrict pet s range of motion (may not be suitable for pets with jumping climbing and biting habits). Size and Material: Expanded Width and Height 45 x 15 inches strong polyester fabric easy to clean. Suitable for: Small animal enclosure for hamsters chinchillas guinea pigs gerbils ferrets squirrels rabbits reptiles or other small animals.