Right now, Walmart is selling such a backpack as a Flash deal, and the discount is almost as deep as the pockets. The Muzpu Waterproof Travel Backpack is on sale for only $35.

Pick school bags with thick support straps to relieve stress from the child's shoulders Choose a backpack with different compartments like one for a laptop and another for essential items like school ...

• Best small waterproof backpack: Arc’teryx Granville Zip 16 Pack • Best waterproof hiking backpack: Fjallraven Bergtagen 38 M-L • Best waterproof roll-top backpack: Osprey Downburst 36L ...

The Siletz system starts with a waterproof 35-liter rolltop backpack. From there, you can add the Laptop Sleeve, the Travel/Photo Insert, and a Night Bag to create the Work & Travel system.