A sheath dress for smart casual garden parties provides clean lines and polished structure without the formality of a full gown. The straight silhouette from shoulder to hem creates a modern streamlined look that works especially well if the dress has interesting details like a patterned fabric or a special neckline. The sheath is form-fitting so the dress needs to fit well through the shoulders and bust. An uncomfortable sheath dress is miserable to wear for hours. A sheath in a stretchy fabric is more forgiving than one in rigid material. The neckline and sleeve details become more important because the silhouette itself provides minimal visual interest. These are the sheath dresses that prove simplicity can be sophisticated.