Sometimes I have a hard time unzipping my ROIK Zip Coin. Is it normal?Updated 2 months ago

The zipper has a safety system that prevents it from opening itself. 

In fact, to open it more smoothly, without forcing it, it is necessary to pull it up and then slide the runner. 

If you do the test you will be able to see how when the runner is at rest it is harder to slide and if you stretch it outwards it goes smoothly.

In the following link, you can find the information provided by the manufacturer in regard.

https://www.ykk.com/english/ykk/tech/03.html

We also attach a photo of the model that we use in all our wallets. Specifically, it is the 3VS DADHR5.