No complicated splicing required, the built-in frame opens in seconds. Folds flat when not in use for easy portability and storage. Keep away from children and faces when opened under spring pressure. Transparent and breathable: The rabbit, guinea pig and pens are made of durable polyester fabric with mesh all around, so you can keep an eye on your pets at all times and for ventilation and eliminate odors. Lightweight and portable: easy to carry, suitable for indoor and outdoor use. Fold into a 20 x 20 cm circle. You don't have to carry a huge cage when you go out with your pet. It can limit the range of pet activities. Very light yet very strong, makes it very easy to travel and move. The transparent mesh design allows you to observe and interact with your pet at all times, and also offers good ventilation to keep it cool to prevent the accumulation of odors. Suitable for: Small animal enclosure, suitable for guinea pigs, hamsters, chinchillas, hedgehogs, mice, gerbils, ferrets, squirrels, rabbits, reptiles or other small animals.