This is a "Photonic Sheet" (145 x 250cm) with earthing specifications. It is a special fabric that combines breathable cotton fabric with carbon fiber. ※ This is a flat sheet made in Japan for everyday use, but it is designed to prevent static electricity from building up due to its special structure. ■ 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 "color fading" from stain removal on a part of the corner (photo 4). 　 There is no problem 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 It will be folded and carefully packed, and shipped via Mercari delivery. Please feel free to comment if you have any questions.