This set is so comfortable, you will want to wear them everywhere, not just to bed! The tank has a built in bra and the pants are brushed cotton poplin pants that are light weight and perfect for the summer. The set comes with a free headband. Tank is made of 47% Cotton, 47% Modal and 8% Spandex. Crop pant is made of 100% Poplin Cotton and has elastic waist band with draw string. Machine wash cold. Gentle cycle with like colors. Only non-chlorine bleach when needed. Tumble dry low. Sizes run as follows: XS (2-4), Sml (4-6), Med (8-10), Lrg (10-12), XL (12-14).