Everyday BackPack ( Expands as needed )

Day travel, school backpack

-Size : 45*31*15cm

-Compatible, point USB charge, Anti theft back pocket

-Sandwich Air Mesh Padded Back Pad 3 Times More Breathable than Ordinary Materials

-Dedicated Shockproof Laptop Compartment Fully Protect Your Laptop - Commuting/Business/Traveling/Couples Backpack

One-pull Expansion by 30% Just Open Zipper, the Capacity will be expanded by 30% Instantly