I am still a slow knitter so I whipped this up just to practice. It's nothing but stockinette and 2x2 and 1x1 rib, seamed together up the back because I didn't have any circulars small enough. And it does an AWESOME job of holding them back, I hula hooped and partied until 4 a.m. and it didn't even try to slip off!
I cast on 60 stitches, I'm not sure what yarn this is but it's a wool/acrylic blend, sort of on the chunky side.
I did 4 rows of k1,p1 (duh, can't think of the name of the stitch...) to keep it from rolling
About 15 rows of stockinette
*About 6 rows of 2x2 rib
4 rows of stockinette, and decrease by 2 sts at each end on the first row
repeat from *
About 15 rows of 1x1 rib, bind off
Very basic, but I like the blocky pattern it makes when stretched over my head. The one complication is that the bind-off is a little tight so it's hard to put the dreads through. How can I make the bind-off row as elastic as the last row of ribbing? I thought that binding off in pattern would help but it really didn't.