Material is 100% viscose from organic bamboo STANDARD 100 by OEKO-TEX® certificate SH015 185006; made without the use of harmful chemicals or pesticides. Breathable, yet insulating; best for year-round comfort Interior ties to keep comforter in place Button closure Hypoallergenic 300 thread count Free of harmful chemicals and toxins Complete your bedding refresh with a new duvet insert Made with care in China The super soft duvet you've always dreamed of. Our mid-weight bamboo duvet is 100% viscose from organic bamboo which is one of the planet's most resource-efficient materials as it grows quickly and uses far less water than cotton. Our duvet is luxuriously soft and silky smooth with a sateen weave and temperature regulating properties. Featuring clean, tailored hems, this set is perfect for year-round comfort. Machine wash cold on delicate with like fabrics, tumble dry low. Avoid bleach. To prevent pilling, avoid fabric softener or dryer balls. To avoid wrinkles, remove immediately after drying. Iron on low if desired. Sized to fit both King & CalKing.