I don't know what fiber you're looking for, but Plymouth Encore makes a sport weight yarn in a wide variety of colors. It's a blend and is machine washable, too.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry