These mittens are knit in the round combining 2 strands of sock yarn. The mittens are light in weight but still warm. These mittens, aside from their exciting colors, are machine washable and dryable, soft, durable, and fit well (plus they are interchangeable). This pattern is suitable for an advanced beginner knitter. Enjoy the color patterns as they occur organically! I have knit several pairs of mittens myself and have used the Kaffe Fassett Design Line Regia sock yarn and some self-striping yarn with great results.