1. Elastic satin fabric, breathable, quick-dry, lightweight, skin-friendly, non-irritating. 2. The empty-top design lets your babies shade while avoiding the stuffy overhead, provides better ventilation to keep your babies dry and comfortable all the time. 3. They are suitable for any baby's outfit and are a good choice for daily wear or travel. Both boys and girls can wear it. A sparkling gift for a birthday, party, holiday, travel, or any other special occasion.