Ernie Ball Earthwood Silk and Steel Soft Acoustic Set， .011 - .052<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Layer of silk between the 80/20 wrap and core </span></li><li><span class="a-list-item"> More mellow sound and comfortable feel </span></li><li><span class="a-list-item"> For acoustic guitar </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/61x7tXRzpVL.jpg" noproxy>