Convenient: Milk bag is small and portable, suitable for all types of bottles (diameter 55-80mm). 4 Layer Material: Feeding milk pouch has the four layers, such as PU 1 layer, PU 2 layer, heating layer, comfortable interior decoration. Safe: Travel baby bottle heater has short-circuit protection and over-current protection functions, is easy and safe to operate. Adjustable: Insulation is 3 levels adjustment, leather material, fine workmanship. Insulation: Heating bottle bag can let your baby drink the warm milk at any time and keep it at a constant temperature. color: gray Material: pu leather + heating film + lining Package Contents: 1 x Milk Bottles Warmer Bags Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.