The Panda pillowcase has been expertly crafted using sumptuous and lightweight 100% organically grown viscose bamboo, with a 320 thread count. Bamboo is environmentally friendly, and the breathable nature of the fabric promotes restful sleep by maintaining a regular body temperature throughout the night. Twice as soft as cotton, the fabric has a silky smooth touch that ensures utmost comfort, and with anti-allergy properties this duvet cover is suitable even for those with the most sensitive of skin. It may be machine washed for your convenience.Due to the nature of the fabric, bamboo is ultra absorbent. During the washing cycle it will retain more water, making the fabric softer & softer after every wash. As a result of this cycle, the bedding should slightly shrink up to 4% during the first 3-4 washes. To accomodate for this minor shrinkage, the bedding has been made around 4% larger. So please don't worry if your bedding look slightly bigger on the first night.