Material is 100% viscose from organic bamboo STANDARD 100 by OEKO-TEX® certificate SH015 185006; made without the use of harmful chemicals or pesticides. Fitted Sheet Set (without flat sheet) includes: fitted sheet and pillowcase(s) (1 standard included in twin, 2 standard included with full/queen, 2 king included with king/cal king) This set does not include a flat sheet. If you prefer to sleep with a flat sheet, please see our Bamboo Sheet Set Fitted sheet fits mattresses up to 16" deep and has elastic all the way around Clean side opening on pillowcases Silky soft and cool to the touch Hypoallergenic 300 thread count King Size Olive New Without Tags