I'm a wimp. Although I have played guitar for 55 years, the callouses on my fingers aren't exactly set up for playing bass, and since I don't play bass parts that often, it doesn't take much effort to wear off my guitar callouses with a set of wound strings - hence my choice of flatwounds. Not only do these strings feel good on my fingers, but the light gauge makes my bass much easier to play. If you need to restring your bass, I highly recommend these. I definitely will be buying another set when that time comes.