CAT WINDOW HAMMOCK: K&H EZ kitty sill hammock offers your cat comfort while sunbathing and viewing the outdoorsCAT FRIENDLY: Cat bed has an open top for easy access and provides a safe and private cat spaceSTRONG & STURDY: Industrial-strength EZ Mount suction cups hold up to 50 lbs. and installs in seconds on glass windows or doors; remember to clean your window and suction cups monthly to ensure a tight seal (see window cleaning image)MACHINE WASHABLE: Includes a washable K&H Pad that acts like an insulator to hold your cat's body heat while trapping cat dander and dirtMEASURE: Be sure to measure your window to ensure the product will fit; solid glass pane must be at least 27" wide and 11" high; Please clean your windows and suction cups MONTHLY to ensure a tight suction cup seal, not doing so can cause the sill to fall