Dunlop Plectrums Ultex 421 0,60

I've been playing the Dunlop Ultex Sharp 1.14mm for a few years now and to me they're simply the perfect pick for electric guitar. I kept breaking the low B-strings on my basses though, therefore I wanted to try thinner, more flexible picks.
The Ultex 0.60mm do flex just enough to feel good while playing, but the material is still so hard that after a (very) short while fissures start appearing around the tip. After as soon as about 2 hours of heavy use, chunks or even the whole tip will just break off.
For electric bass, I recommend you rather check out the Tortex III 0.60mm.