One of the most popular flat wound sets that we sell. Thomastik Jazz flats feel like no other string. They are super smooth and have an amazing low tension due to their highly flexible steel core. The winds are polished for ultimate smoothness. They have loads of volume and feel super slinky under your fingers. If you are a fretless player you have to give these strings a try.....if you play fretted and love the tone of flats.....check these out.