I just bought a Sheath for my new 13 Pro, and it is phenomenal. Nice and slim, very snug fit, and is only lightly textured, so it gives a decent grip without the odd feel that more "grippy" cases can have. There is a small raised lip around the camera bump, so when you lay it flat, the lenses don't contact the surface.
It is a huge step up from the silicone case IMO. Got the Mesa Blue for my Sierra Blue 13 Pro. It looks great!