1. [Unique Design] We design a detachable inner bag for this diaper bag. When the inner bag soiled or damaged during use, it will be very easy to be took out to wash or replace a new one. The design will be also very convenient to pack your stuff, which means you could organize your baby needs with the inner bag firstly, then just put the inner bag into the outside backpack. 2. [Large Capacity] The inner bag contains 2 insulated pockets for baby feeding bottles to keep warm or cool, and 4 side slip pockets for diapers. The outside backpack with 2 front zipper pockets, and 1 safe pocket at backside. Also the 2 side pockets could hold your umbrella or thermos cup. 3. [Optimal Material] We use the Polyester 600D for the outside black backpack, which durable, textured and waterproof. The detachable inner bag was made of high quality Nylon Material, which very smooth and also waterproof. 4. [Portable Feature] The detachable inner bag will be very easy to install by snap buttons. The outside backpack with Top Handle and Stroller Hooks, which you can wear it as a backpack, or hold the top handle as a satchel. Also you could hook the bag on your baby strollers.