Esme Youth Short Sleeve Lounge Pant Pajama Set XXS/14 XS/16 S/18 M/20 L 6% spandex Esme size runs different than other brands, check the measurements below under Product Description. Extremely soft, comfortable, and lightweight; 47% Modal/47% Cotton/6% Spandex Soft pima / modal cotton. Breaths in cold and warm weather. Made in USA Machine wash in warm or cold water.