Each issie security blanket is made from aden + anais signature fabric ? natural cotton muslin ? and lined with an ample strip of soft satin. Muslin is breathable, and the fabric?s light, open weave construction allows liberal airflow that helps prevent overheating. Measuring 16 x 16 inches, the issie is designed to be portable and the ideal size for cuddling. Each pack contains two identical issies, so there is always one available for snuggling while the other is in the wash. Playfully designed in exclusive, modern prints, the issie is available in several different patterns.