PM2.5 filter consists of 5 layers. You put the filter in a mask with a filter opening. A filter can be used for 5 to 7 days. The filter offers extra protection against bacteria, viruses, particulate matter (pm.2.5), pollen, exhaust gases etc.
Artificial leather wallet / phone bag with multiple pockets for cards, slot for bills and a pocket with zipper for ransom. At the front is a compartment for the phone.
Leather backpack that you can also wear as a shoulder bag. At the front there are 2 compartments with zippers and in the middle a compartment with flap that closes with a magnet.