Feature:Bottom of the bed was made by PU material,a little waterproof,pls note that before you buy,thanks! Color:May vary to the stock,customer may not choose Note:The color of each set is not all the same,we post them Randomly,we can't make sure which color you may get,so we don't accept return/refund for the above reason,pls note that before you buy,thanks! Size:44cm long x 38cm wide x 3.5cm deep(Small),57cm long x 43cm wide x 3.5cm deep(Medium),66cm long x 50cm wide x 4cm(Big)