Undies.com Cotton Demi Push-up 3-pack Bra Set semi push-up in cotton is a classic style for those looking for less coverage and a little lift. This silhouette offers versatility, comfort, and a flattering fit. With very minimal stitches to show for, this push-up bra is smooth and has a subtle finish that makes it almost un-noticeable under a t-shirt or body fit shirt.