I have multiple pairs in multiple colors including piper's white, and I am not a piper. I only wear the white ones with a white shirt, tie, and dress Argyll, however, (I can hear Jock and Mac o Rath lunging for their keyboards already) as I think they only really look good with the dressier stuff, although this goes against tradition, as I am sure many here will be expressing shortly. These hose, in various colors, are my favourite hose of all in my collection.

Not sure what price you got them for on ebay but they are readily had at several online vendors for $30US or less (my favorite below)

http://www.college-of-piping.co.uk/a...Kilt_Hose.html

The white are 100% acrylic while all the colors are supposed to be 70-80% wool.