The soft fabric in SÅNGLÄRKA duvet cover and pillowcase is woven in flax and sustainable cotton. Pure natural materials that breathe and transport moisture away. The flax’s fibres also give a special lustre and structure, as well as a natural protection from stains and bacteria. Separating the flax from the plant is a time-consuming process. That's why these cost a little more, but for the money, your child gets really durable bedlinens that only get more beautiful over time.