C.F. Martin Acoustic Marquis Folk Guitar Silk & Steel Compound Wound, .0115 - .047, M-1400star rating 4SammyMarch 11, 2010These strings are absolutely beautiful. They are great for any type of acoustic playing you can think of from traditional style flat picking to what ever you would call what Tommy Emmanuel does. They have a great sound that doesn't alter over time. OVERALL I highly recommend these.