Triplast 50 x A4 Punched Pockets - Transparent & Top Opening for Easy Access -

These plastic sheet paper protectors are are made from durable polypropylene plastic and are non-toxic, odour-free, transparent, and reusable. With 11 punched holes, these file pockets are widely compatible and you can instantly start using the sheet protectors with any kind of file or binder.

eBay