Thread: New four sided Strop, which side to use?

I've been wanting to get in to learning how to use a straight razor for some time now, and my girlfriend fantastically surprised me with a Dovo Razor and supplies for Christmas.

The strop she gave me looks like a two in one (two strops connected at the top) and being new to this I have no idea which of the four sides to use. There's a smooth black leather side, a black cloth side, a brown soft but textured "hide" like side, and brown slightly rough leather side.

Any suggestions? I know most strops you use both sides, but in this case four is just overwhelming me.