best 45 liter travel backpack Peak Design 45L, Black, Expandable 35-45L Design, Rear and Top Access, Weatherproof Shell, Laptop Sleeve, Ideal for Travel or Everyday Carry, Versatile Backpack for Men and Women: Clothing, Shoes Side Color:Chocolate (4) happy dog Herschel | Herschel Little and the rear panel

best 45 liter travel backpack Peak Design 45L, Black, Expandable 35-45L Design, Rear and Top Access, Weatherproof Shell, Laptop Sleeve, Ideal for Travel or Everyday Carry, Versatile Backpack for Men and Women: Clothing, Shoes Side Color:Chocolate (4) happy dog Herschel | Herschel Little and the rear panel

Herschel | Herschel Little America™ Mid Backpack - 21L - Eucalyptus – Montana Supply Co.

Best design — this computer shoulder bag has different size options to fit your needs perfectly

happy dog

Side Color:Chocolate (4)

I think it's both at the same time

and the rear panel features a handle that doubles as a trolley sleeve for attaching to rolling luggage