osprey backpack natural habitat adventures Daylite Plus Commuter - Lightweight, Everyday Pack with Laptop Sleeve and Water Bottle Pockets An internal divider allows for efficient organisation of gear Osprey Sport Lite 30L Backpack:

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It has a large 26L capacity (one of the biggest on this list), but is compartmentalized in a way thats accessible to younger students

But its also over $200, with very little internal organization and an open top

And then there is a tiny feature people underestimate: metal base feet

The large suspended mesh panel that covers the back and most of the hipbelt provides excellent ventilation - probably the most I've had from a backpack

Without question, my favorite is the Chompers skirted twin tail