All products in the collection are made of 100% organic cotton. Their organic cotton composition ensures that no chemical fertilizers have been used in the cultivation of cotton which makes them 100% hypoallergenic. Certified with GOTS (GLOBAL ORGANIC TEXTILE STANDARD) for fiber biology and with OEKO TEXT for the absence of harmful substances in fabrics. The series sets include 1 or 2 pillows depending on the dimensions you choose (single or double).