Blue linen Marquise gingham dress from Sleeper featuring square neck, lace-up detailing, flared, front slit and short puff sleeves. POSITIVELY CONSCIOUS: At least 50% of the main material of this product meets our conscious criteria. For example, it's either organic, recycled, upcycled or independently recognised as being better for the environment (such as linen, ramie, TENCEL™ etc.)..