Environmentally friendly mylar bags: mylar foil bags are made of polyethylene, aluminium foil and polyester film, anti-oxidation and anti-moisture, durable and not easy to tear or damage. Zip-lock bag design: thanks to the zip, the bags can be easily closed and opened, can be used many times. Sealing strips that are leak-proof, make it reusable and resealable; there are two cuts on the bag help to open the zip bag quickly and conveniently. 100 pieces reusable: please check the size and colours carefully before purchasing. Sufficient quantity and suitable size for daily use and replacement. Keep sandwiches fresh, portion your fruits, nuts, snacks, sweets and much more. They are really practical. Bright colours: they are shiny, rainbow holographic effect is super beautiful. Stylish and practical clear window design to allow a simple view of the items in the bag, is ideal for storing and organising. Wide application: you can use them to store small and sensitive items such as jewellery and wearable tech, e.g. earbuds, blue tooth earplugs, coffee beans, tea, jewellery, stationery, office clips, fishing equipment, fishing hooks and such small items. You can use it for all kinds of things.