This is a "Photonic Sheet" (145 x 250cm) with earthing specifications. It's a special fabric that combines breathable cotton fabric with carbon fibers. ※ This is a Japanese-made flat sheet for everyday use, but its special construction makes it less likely to accumulate static electricity. ■ Features (excerpt from the manufacturer's description) The included leaflet summarizes the manufacturer's descriptions, such as "structure that easily dissipates static electricity" and "characteristics that are not easily affected by the external environment" (photos 6-9). ■ Condition Washed but unused. ※ There is some "color fading" from stain removal on a part of the corner (photo 4). 　 There are no problems with the functionality. ■ Size 145 x 250cm (flat sheet) Compatible with W beds ■ Material (tag notation) Cotton 94% Conductive nylon filament 5% Other 1% (linen, rayon, tourmaline, etc.) ※ Made in Japan ■ Care ・ Use a laundry net ・ Bleach / fabric softener are not allowed ・ Shape and hang to dry in the shade ・ Avoid tumble drying ■ Accessories Instruction leaflet 1 sheet (photos 6-9) ■ Shipping Shipped anonymously on the same day or the next day. We will deliver it in a condition that you can receive with peace of mind. Please feel free to comment if you have any questions.