The closure mechanism on this bag is a zipper. This particular bag is made from polyester.
From Comet
DICOTA Eco Slim Case BASE 35.8 cm (14.1") Briefcase Red
Yes Infotech
Eco Slim Case Base - 13-14.1in Notebook Case - Red / 300d Rpet Polyester
This product is also available at 4 unverified stores.