The Dignis cases have no clip or fixture for clip/belt. They're high quality leather. I for one would hate to cut slits in one of these, and would also worry about sweat destroying the leather. These are definitely not designed as sport cases!
I was interested in getting one of these cases but it seemed the website was mostly in Korean which I can't read so I got a stuck trying to order a case. Did you manage to navigate the site alright?