In general, guinea pigs aren't climbers, so the only reason for a cover is to protect them from children or other animals. A cage cover must be strong and RIGID to support the weight of an animal -- without caving in -- and provide quick and easy access. Simply fold the front half over the back row, or prop open (tent-like) by resting the front row on the middle connector. OR fold it all the way back out of the way! Detailed instructions provided.