WHITE. BDG Urban Outfitters Knockout Lace Up Top. Essential short sleeve crop top by Out From Under in our signature stretch-knit seamless fabric. The Out From Under Knockout seamless lace-up crop top has a fitted silhouette with an adjustable lace-up front at the plunging scoop neck. So soft and stretchy with a textured waffle finish we love. 80% Modal, 15% polyamide, 5% spandex. Machine wash. Imported.