[DODEKA suction cup sticks to itself! Mat included.
Large suction cup attaches to glass surface.No problem when you jump on.Besides windows, you can install it on walls and tiles, if you have a smooth surface without uneven surface. 3 strong suction cups firmly support and load capacity of 33.1 lbs (15 kg). (It is OK for up to 44.1 lbs (20 kg), but the step part is approximately 11.4 x 15.4 inches (29 x 39 cm), so please consider the size of your cat in your house when purchasing.
The mat on the top of the step is fastened with a velcro fastener, so you can rest assured that it will stay in place even if your cat jumps.Since it is made of carpet, some cats can sharpen their nails.