Comfortable Cushion Bed Cover: This cat window perch is upgraded with thickened fluffy cushion bed cover, which give cats more comfort and safety while sleeping on it. The cover is made of soft plush fabric and cotton, perfect for keeping warm. Let your cats feel more comfortable while lying in this resting seat. It is of Velcro tape design, easy to remove for wash. Simple Assembly & Adjustment: The assembly of this cat window hammock is easy that only a few steps are taken to set it up. After the assembly is complete, you just need to screw the thumb screws to adjust the distance between hooks and supports to fit the thickness of your window sill.