100% microfiber 1.FLUFFY & COMFY: Our King Size Comforter (90x102 inch) is Filled with 62 oz Elastic & Hollow Down Alternative Microfiber.The material is Soft, Comfortable and Breathable. It springs back quickly, making the comforters fluffy. The comforter is suitable throughout the year. It can upgrade the sleep quality and make you full of energy every morning. 2.SOFT & ELEGANT: Our duvet insert cover is made of 105gsm double brushed fabric. It is extremely soft, skin-friendly, and it will not pill. There will not be any static electricity or noise. The design is simple and elegant, which fits all types of room decoration, adding more beauty and coziness to your bedroom. 3.SCIENTIFIC FILLING: The Comforter is filled with 100% hypoallergenic 300GSM polyester. It is soft, fluffy and comfortable,which can protect you from dust mites, mold and mildew. The whole sheet made of hypoallergenic polyester, will not knot when washing or using. 4.HUMANIZED DESIGN: the corner tab design enable the users put the comforter in place easily. This item can be used as a bedding comforter as well as a duvet insert. 5.EXQUISITE WORKMANSHIP：Our quilted duvet insert is sewed solid and smooth, so it durable for machine washing. Attention: The washing mode should be gentle cycle with cold water, and hang dry or tumble dry in low.