Built on his name and demand for quality, Wiljer has consistently made some of the best sleeves available anywhere.  The picture is an attempt to show the extra canvas liner that is hand stitched inside of the sleeves.  This is what helps to make the Wiljer sleeve last longer than pretty much any sleeve on the market!  Be sure to check out the blue devil covers also to give you a little extra scrubbing power on those hard to get clean jobs!