A sheath dress is fitted through the bodice and hip and skims the body without clinging. The straight silhouette reads as sophisticated and intentionally dressed for a formal occasion like a wake or reception. Black sheath dresses are timeless for good reason. The dress should be cut and constructed so that the fabric follows your shape without pulling or gaping. Look for dresses with a neckline that feels appropriate and formal. Sheath dresses work because they require you to be comfortable in your body but they reward that comfort with a polished and elegant line. These are the sheath dresses that work for receptions where you want to look composed and carefully dressed.