As someone who never used to wear a bra to bed, I had no idea a bra would make a difference in my quality of sleep but the Spanx Bra-llelujah! Mama ($58) did! I'd originally gotten this bra to use for nursing, but once I tried it on, I never wanted to take it off. I love that it doesn't have any wires and has an all-hosiery back which is so perfect as my cup and band size increase. This helps me feel comfortable and supported during the night.