Petio Spacious Lounging Cool Aluminum Pillow Sheet M Size Quantity: 1 Size: 375 x 280 x 22 (mm) Cools down with "air-through structure" for high heat dissipation efficiency. Uses high-purity aluminum of 99.6% or more. Anodized for scratch resistance. Wide and comfortable with the chin resting on the pillow part. There may be slight warping depending on the product. Also, there may be some minor scratches due to the manufacturing process, but there is no problem with the performance, so please understand and consider purchasing.