The Momcozy breast therapy packs at -18 /-0.4 for at least 4 hours. Use them cold after nursing, pumping, or a long day of breastfeeding to enjoy a refreshing, cooling sensation that helps you relax and feel more at ease. Ideal for breastfeeding moms, exclusive pumpers, and those using a wearable breast pump-perfect for soothing after extended nursing sessions or night feedings.