Ideal where floor space is limited, and wall space is available.. each box comes with high sides to keep out draughts and can be filled with warm fleece bedding.  Ideal for a multi number of cats, that have free access to sleeping areas. Can be positioned high or low to accommodate your  cat/s needs.  Wooden bracket is supplied, (but metal brackets would be advised,) depending on the amount of cats that would be using the nest boxes and the nature of the of wall being placed onto.