Superb quality and one of the larger small animal items we sell. It is made from quilted type material and attaches to the cage with clips. There are two options for pets who can either lounge on the top layer or snuggle in the bottom one. MEASUREMENTS: Bottom section 40cm (16") along the front edge. Top section 30cm (12") along the top edge and 30cm (12") deep. This item will comfortably fit 2 adult ferrets or 5+ adult rats.