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http://littleknits.com/new-products/cascade-220-superwash.html
" Cascade 220 Superwash: Reduced to $6.99-$5.50/Skein From $10.50/$11
Cascade 220 Superwash brings the wide array of vibrant colors we love to a 100% superwash wool yarn: bold solids, subtle heathers and quatros with abundant yardage, and softness you can put next to the skin. The perfect yarn for just about anything.
Our flat rate and free shipping rates apply to this sale."
ETA - the cheapest ($5.50) are the Quatro line. they’re tone-on-tone and some have almost a tweed effect. lots of color choices - 97 in all. 
“33-50% Off 24 Hours Flash Sale!
Cascade 220 Superwash brings the wide array of vibrant colors we love to a 100% superwash wool yarn: bold solids and subtle heathers, abundant yardage, and softness you can put next to the skin. The perfect yarn for just about anything - now washable! Note: 220 Superwash is a slightly lighter weight than the traditional 220. Check gauge accordingly if substituting one for the other.
Fiber Content: 100% Superwash Wool
Yardage: 220 Yards for each 100 gram skein
Gauge: 5-5.5 Stitches to an inch on U.S. size 6-7 needles
Care: Machine Washable.”
