Transparent and breathable: surrounded by mesh. You can monitor your pets at all times, while providing playpen ventilation and eliminating odors. Self-Opening: No assembly required, built-in frame opens in seconds. Folds flat when not in use for easy transport and storage. When opening, please keep away from children and face due to spring pressure. Outdoor/Indoor: The pet exercise fence is easy to carry, you don’t need to carry a huge cage when you take your pet out. It may limit pets’ varieties of activities (it may not be suitable for jumping, climbing and biting pets). Size and Material: Open Cage Dimensions: 120cm x 38cm (width x height), durable polyester fabric, easy to clean. Compatibility: Small animal playpen, suitable for hamsters, chinchillas, guinea pigs, mice, gerbils, ferrets, squirrels, rabbits, reptiles or other small animals.(Black)