The Surface Layer Is Made of Bamboo Fiber Lining, Which Feels Soft and Comfortable. The Middle Layer Is Super Absorbent Microfiber, Which Can Quickly Absorb Spilled Milk and Keep It Dry. The Outer Layer Is an Anti-Seepage and Breathable Film to Prevent Milk from Penetrating into Clothes and Avoid the Embarrassment of Penetration in Summer. Washing Method: 1. Please Wash before Using This Product, It Is Recommended to Wash by Hand, Do Not Dry Clean, Do Not Iron, Do Not Soak in Water for a Long Time, Avoid Exposure to Sunlight 2. Breast Milk Is Rich in Protein, Which Is Easy to Breed Bacteria. Please Replace the New Breast Pad in Time after Complete Absorption, Which Will Help Protect Breast Hygiene and Health 3. Repeated Use of Breast Pads Will Produce Residual Odor in Breast Milk. It Is Recommended to Soak in Light Salt Water for a Period of Time to Remove Peculiar Smell.