Hot or Cold Therapy. Cold Therapy: Relieves Engorgement Hot Therapy: Relieves Mastitis, Plugged Ducts Breast Pump Aid: Use Warm to Reduce Time Spent Pumping Lansinoh, the 1 brand in breastfeeding accessories, brings you advanced relief with TheraPearl 3-in-1 Breast Therapy;Whether hot or cold, these reusable & non-toxic packs can be used for a range of conditions, so you & your baby can make the most of your breastfeeding experience;Its unique design conforms to your breast or pump like a bag of peas to provide 360° relief;Doctor designed & lactation consultant approved;Latex, lead & BPA Free. Reusable therapeutic hot & cold pack for use with pain, swelling, engorgement, plugged ducts & mastitis associated with breastfeeding or to help encourage let-down while using a breast pump. 2 Reusable Treatment Packs & Covers. Parent Tested;Parent Approved. Suggested Use: For heat therapy: Heat in microwave for time indicated on pack or package inset. For cold therapy: Freeze for at least 2 hours. For use with a breast pump: Heat packs & wrap around the outside of breast pump flanges while pumping, securing with the snap. See package insert for full . UPC: 044677102001 Weight: 0.83 lbs