Made of Cotton/Modal/Rayon/Spandex blend. This racerback tank with comfortable built in bra has a unique blend of cotton, modal, and spandex which gives it an ultra soft hand feel that will put you at ease when winding down from your day. The floor length, baby waffle thermal pants have a wide leg and roll down waist band. This set is perfect for lounging, sleeping, or even wearing to yoga class. Machine wash in cold water. Tumble dry low. Remove promptly. Do not Bleach. Sizes run as follows: XS (2-4), Sml (4-6), Med (8-10), Lrg (10-12), XL (12-14).