Breast Kozi's are designed to provide all natural comfort & pain relief for symptoms experienced during nursing and weaning. Handmade from soft, cozy 100% cotton fabric and natural flax seed. Crafted into a graceful curve that easily slips into a nursing bra or tank. Use heated to encourage let- down, and prevent clogged milk ducts or chilled to relieve breast tenderness. Slip hot or cold Breast Kozi into nursing bra for targeted relief. The stylish and flexible design provides natural, soothing comfort for mama and baby. Filled with 100% natural flax seed, unscented. Dimesions: 7" diameter.