The flexible, reusable Lansinoh Thera Pearl 3-in-1 breast compresses have a soft surface, making them easy and comfortable to insert into a bra to neutralize or at least alleviate potential breastfeeding issues: clogged milk ducts and mastitis, tension and swelling of the breasts, allowing milk to flow freely. In addition to being free from BPA, BPS, and latex, they are also designed to fit around the breast pump to stimulate and accelerate milk flow. For hot use: Thera Pearl 3-in-1 breast compresses can be heated in the microwave for up to 15 seconds to open milk ducts and relieve mastitis. The warmth promotes milk flow, meaning less time is needed to pump breast milk. Due to their unique design, these breast compresses remain flexible even when frozen.