1.3+3 layers of professional fresh-keeping breast milk asas ever - Focus on breast milk fresh-keeping cold bag with 3 layers of lock cold, carry milk bag with 3 layers of heat insulation, let working mothers easily carry milk, feed love forward2. Two layers of storage for easy storage - according to the needs of mothers carrying milk bags, the design is for easy storage of the upper two layers, easy to carry milk, the upper layer can be put breast pump, lunch box side bag can be placed tissue and other things, the lower layer can be placed cold, ice bottle, large opening design, easy to store and take3. Waterproof and dust repellent as new - surface high-density water pouring fabric, waterproof and dust resistant, no bother to take care of4. A package that can be used by the whole family - it can be used as a bento bag, picnic bag, etc., a bag that the whole family can use5. A variety of back method has its own switch, can be portable, single shoulder, double shoulder