NWT Skims Onesie. Their signature mid-thigh bodysuit silhouette, in super comfortable cotton. Take this one-and-done style and wear it alone or layer it with your favorite blazer, sweatshirt, or jacket! Hits At Mid-Thigh, Fully Lined With Mesh For Smoothing And Light Support, Cotton Binding Along Neckline And Underarms. 95% cotton and 5% spandex.