4-Piece Set: Organic Bamboo Bed Sheets from $19.99 + Free Shipping These 1800 series organic bamboo fiber sheets are comfortable, ultra-soft and silky which ensures your body and mind get a peaceful sleep all night long. These bamboo sheets are made up of an eco-friendly organic bamboo fabric blend with microfiber, offering luxury coziness and breathability. Add $3 for Queen size and $5 for King size sets.