Flexible and reusable, Thera°Pearl 3-in-1 Breast Therapy packs have soft covers that can be slipped comfortably inside your bra to relieve any discomfort that can be caused by some conditions associated with breastfeeding. BPA, BPS, and latex-free, they are also shaped to fit around a breast pump to encourage letdown and promote faster milk flow. Thera°Pearl 3-in-1 Breast Therapy packs can be heated in the microwave for a maximum of 15 seconds to provide relief for plugged ducts and mastitis. The heat encourages milk flow, which means less time is spent pumping the breast. To use alongside a breast pump, you just heat the pack as usual, then wrap it around the outside of the pump's funnel, securing it with the fastener. Alternatively, you can put the packs in the freezer for a couple of hours to cool, then place them into the cover provided to relieve pain and swelling caused by engorgement. The unique design means that the pack is flexible, even when it is frozen. It is recommended that Thera°Pearl 3-in-1 Breast Therapy be applied for 20 minutes at a time, as per medical advice. Once used, it can be cleaned with a mild soap, detergent, or alcohol.