See Size Chart in photo for correct sizing. Sizes run generous and should last at least 3x as long as traditional pajamas. * Made of 95% bamboo 5% viscose this fabric is buttery soft, and extremely stretchy. * Breathable, thermo regulating, hypoallergenic, and eczema friendly. * Sustainable and eco friendly material. *  Last three times as long as traditional pajamas. *Stretchy fabric that grows with your child. * Snug fit in accordance to CPSC safety regulations.