[ INVISIBLE EXPAND ] : Dimensions: 17.7 x 12.6 x 4.7 ~ 8.7 inches, capacity: 18L ~ 32L. Casual daypack has smooth zippers on side. Once pull on the zipper, bag will offer large capacity up to 32L for you to store more stuffs (Laptop pocket size: 15.7 x 11 x 1.2 inches)
[ DOUBLE PROTECTION ] : FENRUIEN hard shell computer backpack is made of high-density waterproof PC&ABS and oxford to ensure your items stay dry during light rain. Pearl cotton will protect your laptops and valuable items from shock
[ TSA FRIENDLY FEATURE ] : The lightweight travel backpack with scan smart technology can be freely opened 90-180 degrees, allowing you to quickly pass the airport security check and keep your things tidy. TSA customs lock can protect your items from thieves(Please don't set a password before reading the instructions)
[ ERGONOMIC DESIGN ] : Adjustable anti-slip breathable S-shaped mesh shoulder straps with plentiful sponge help relieve the stress from your shoulder. 3D honeycomb breathable back cushion can reduce the sultry feeling of the back
[ USB CHARGING PORT ] : Built-in removable charging cable is convenient to charge your cell phone by connecting your power bank, this slim USB backpack can free your hands from power bank (Power bank is not included)
