Made of Satin, PU and acrylic the 6cm x 5.2 cm Reusable Red Diamond Heart Nipple Pasties will cover up your nips and up dress any under garment. Reusable, Self-adhesive and hypoallergenic - can be worn for up to 8 hours. To reuse: Simply wash with soap water, Lay sticky side up to air dry. Store it clean for next use.