Hellolulu Simo All Day Backpack (Shades Navy)How did you spend your trivial time before smartphone? Reading is a way to kill time, spending trivial time to read every day may add up to a huge knowledge base. Hellolulu's backpack SIMO can help you to develop the habit of reading, you may put any books or magazines in the back side, whenever you wanna read, just take it out easily. The extra pocket allows you to put a water bottle there, reminding you to drink more water. With multiple inner