Pajama Heaven Sour Apple Baubles Tank Set (Apple, XL) 95% viscose from bamboo Tank top has stretchy smocking detail and adjustable straps for a great fit. Classic cut shorts sit at the natural waist and stay in place with a wide stretchy elastic waistband for a comfortable fit. Perfect lightweight material for spring and summer nights Pajama Heaven Jersey is a stretchy, silky soft material that feels light against your skin. The material is made of 95% viscose from bamboo and 5% elastane Sizing Runs as follows: Small (2-4), Medium (6-8), Large (10-12), XL (14-18).