Satin Cowl-Neck Slip Dress This isn't your average satin slip dress. With a slouchy halter neckline, this Satin Cowl-Neck Slip Dress ($129) looks like it was made to be worn at a formal event. Image Source: bananarepublic.gap.com Satin Cowl-Neck Slip Dress $129 from bananarepublic.gap.com Buy Now