Lansinoh TheraPearl 3-in-1 Breast Therapy packs provide therapeutic relief for the most common breastfeeding challenges. Cold therapy is great for relieving engorgement while hot therapy helps relieve plugged ducts and mastitis and encourages milk let-down. TheraPearl Therapy packs can also be used hot with any breast pump to encourage milk let-down and reduce time spent pumping. Microwave safe, BPA free and BPS free. The unique design conforms to your breast or pump to provide 360° relief. Gender: unisex.