Keep the case closed (in case of an accidental drop)

[LoveMyPhone]

Has anyone figured out a way to keep the official Samsung S-view type case closed? Speigen used to sell a magnetic closure that you could attach to almost any case. And it worked great. I still have some but they don't work on the S8 cases
I love the Samsung cases because they are so thin!
If anyone knows of anything please pass it on (and I don't mean putting a rubber band around it