DR Strings RCA-12 SUNBEAM Round Core Acoustic Guitar Lt 12-54
[RCA-12]

These are round core strings. Just as advertised they are soft to the touch and have great sustain. They sound terrific. The only down side is these low tension strings buzz a bit in drop tunings. I suspect switching to 13's will resolve this. Still, for standard tunings these are 5 star strings.