These fitted cot bed sheets by Panda are expertly crafted from environmentally friendly bamboo fabric, with a thread count of 320. Twice as soft as cotton, bamboo has a comforting silky soft cashmere-like touch that'll keep you're little one snug at night, and with anti-allergy and anti-bacterial properties these sheets are suitable even for those with the most sensitive of skin, reducing the risk of skin irritation or allergies that chemically coated fabrics can provoke, and resists the build up of dust mites and mould. The breathable nature of bamboo helps regulate a stable body temperature at night for restful sleep, and its absorbency wicks away moisture and odour as your child sleeps, keeping them dry and comfortable. These sheets are easily machine washable so both you and your little one can sleep easy.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 accommodate 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.