Lightestspun Cover-Up Maxi Shirtdress from Madewell Black, Size Small - fits like a size 6 Made of a featherweight version of our best-selling Lightspun double gauze, this shirtdress cover-up comes in a luxurious maxi length with high side slits (and, since the buttons go all the way down, it even doubles as a duster). Relaxed, slightly oversized fit. Cotton. Do Well: by buying cotton products from Madewell, you're supporting our investment in Better Cotton's mission to help cotton communities survive and thrive while protecting and restoring the environment. This product is sourced through a system of mass balance and therefore may not contain Better Cotton.