Man, it is so weird to me that people have problems with nylon leashes. I actually have never been able to get a good grip on leather. It could just be that I'm doing it wrong, but it has never worked for me, and I've tried a bunch of different ones at vendor booths, so I'm pretty sure the issue is with me and not the leashes.
The mysteries of life.
ARCHMX TDCH Pongu the Insane, CD-C, RE, RL1X6, RL2X5, RL3X2 (GSD mix, b. Apr 2010)
Crookytail the Tigerwuff, RL1, ITD (Akita mix, b. Jan 2011)