I purchased an authentic Nihon Bed mattress, but it didn't suit me, so I'm selling it completely unused. The smoky gray box sheet has been opened, but it is unused, so please rest assured. Product Information Product Name: Nihon Bed Basic Pad Making Set 3-Piece Pack Dimensions: 165cm x 200cm (for both bed pad and box sheets) Bed Pad: Product Name: Basic Pad Surface Fabric: 65% Polyester, 35% Cotton Filling: 100% Polyester (Antibacterial, Odor-Resistant, Anti-Mold Treatment) Made in Japan Box Sheet: Size: 165cm x 200cm x 35cm Material: 100% Cotton Treatment: Antibacterial, Odor-Resistant, Shrink-Resistant Made in Japan Contents: - Bed Pad x 1 - Box Sheet, Ecru White x 1 - Box Sheet, Smoky Gray x 1 Note: Images are for illustrative purposes only.