I'm selling this cat bed because my cat at home didn't even look at it, and never used it. The sides of the bed are roughly woven in a wave pattern! The bottom is tightly and firmly woven. A bed woven from natural rattan. Natural rattan with good ventilation. Remove the cushion in the summer for coolness, and put the cushion on in the winter for warmth. This bed can be used throughout the year. Natural rattan develops a unique texture over the years, so enjoy watching it become cat-colored!