PajamaMania Women's Bamboo Jersey Light Weight Tee and Shorts Pajama Sets 70% Bamboo Viscose/30% Cotton Short sleeve scoop neck top features a slight flair around the hips to give this pajama top a relaxed fit. Classic fit shorts sit at the natural waist and stays in place with a stretchy elastic waistband for a comfortable fit. Perfect lightweight material for spring and summer nights The material is made of 70% viscose from bamboo and 30% cotton Sizing Runs as follows: Small (2-4), Medium (6-8), Large (10-12), XL (14-18).