Using a zipper to close a bag is as easy as it gets. The choice of material is polyester.
From Viking Direct
DICOTA Laptop Bag 15.6 " 300D rPET Polyester Black 41.5 x 6.5 x 29.5 cm
Conrad Electronic
Dicota Laptop bag Eco Multi BASE Suitable for up to: 39,6 cm (15,6) Black
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