I tried these out as a departure from the Petzl/BD paradigm.12mm is nice, a little more confidence inducing for the scared little man in the back of my mind.Color other than white/silver is nice too.Unfortunately, they snag on everything. 1 week in and they're a little tattered. If that is how they stay, fine. If they continue though, I'm getting 2 months out of a sling. Seems short.