obviously not, but it's filtered on 'cotton' Something to improve, Amazon! ;)

What is the composition of the material? What are they made of since it describes them as better then Egyptian cotton?

I was looking for the same information, and I found it in another response -- the fabric is rayon. "Question: What thread count are these sheets?Answer: They are microfiber. The thread count doesn't really apply to them - they are rayon and not cotton. By Cindy Campbell on May 27, 2017"

Is flat sheet 100 percent cotton

It is not cotton. It is microfiber, a man-made fabric. It’s extremely soft, smooth and comfortable. I prefer this to cotton. It doesn’t wrinkle, keeps you either warm or cool, requires no ironing (my grandmother used to starch and iron her sheets!) and mine don’t pill. Much nicer feeling and looking than cotton.

Manufacturer	CGK Unlimited
Model Number	5060623447908
Package Dimensions	33.3 x 26.5 x 11.3 cm
Material	シルク
Color	04 - ライトグレー
Size	キング
Special Features	通気性
Package Weight	1.95 Kilograms
Batteries Required	No
Batteries Included	No
Material Care Instructions	洗濯機洗い
Brand Name	CGK Unlimited

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