1200 tc of wood fibers maybe. Good size... but they wrinkle semi permanently if you so much as look at them, theyre thick (maybe better in winter than summer) and stiff not soft at all. Also the under side is a different color than the top so if you fold the top of your flat sheet it looks awful. Also dislike that its a 4 piece (only 2 pillowcases) for a king set, but that was my oversight on purchasing. It would have been fine though if the rest wasnt junk.

These are very nice quality sheets. The material is sturdy and soft. Heavy elastic band to hold the sheets in place. They wash well with a slight wrinkle. Not bad.

This is one of the worst sheet sets I have ever purchased (anywhere). I washed the set the day it arrived. I was SO excited to try it. I have had sateen sheets in the past, so I expected to have the same luxurious experience with this set. Once I got into bed that night, I was not happy. I hate the feel: it feels like I have tent material (polyester) against my skin - VERY uncomfortable. While making the bed, I noticed what appears to be a stain on the fitted sheet (I have included a photo). The color is okay, so more colors should have been available. NOT a fan of the fitted sheet elastic - it goes around the entire sheet, making the corners look a little bunched up. No, I would not buy this again and I definitely do not recommend this product.