Specifications: single layer 51 x 31 cm (0.45 kg), double layer (0.65 kg) 1. The cat hammock’s durable window features a breathable, heavy-duty mesh base that provides your pet with a secure base to lie on, such as tile, stainless steel, glass, mirrors, refrigerators, washing machines, metal coating, etc. for use on frosted glass, patterned glass, or curved glass to avoid. 3.Easy installation - no tools required to use. This space-saving window cat bed can be set up and assembled in minutes without tools The mesh cat hammock is quick breathable, anti-scratch, the whole set can be easily disassembled and assembled as you like to clean. You can cover a blanket for our cat when it is cold, it can be used all season. 4. Fits Cats of All Sizes - The stacking cat window pole is suitable for indoor use and can accommodate even the largest of cats. Your cat can jump in and out of this resting seat, which is another type of exercise to keep your cat healthy. 5.Design - We designed our cat