You use a zipper to close this bag. Maybe not a good choice if you prefer lots of colour choices, but it does come in green and there is a special compartment for laptops or tablets.
From OnBuy
THE NORTH FACE Borealis Commuter Laptop Backpack Optic Emerald/TNF Black One Size
Asos
The North Face Borealis rucksack in emerald/black-Green