Serena Pencil Leg Crop Dress Pant with Sexy Back Slit Hem. Serena is a Tapered Leg Fitted Crop Trouser with Hidden Elastic Waistband, Hidden Side Zipper Closure, Flat Front and Back Stitch Seam Detail, and Sexy Back Slit Detail on the Hem. These are GORGEOUS Fitted Pants with a Slight Stretch to them! 95% Polyester, 5% Spandex. Available in Black, Dark Navy, and Khaki.