This neck warmer is comprised of hand-crocheted squares which have been joined using mattress stitch. This work-in-progress picture gives you a close-up look at the first two rows of joined squares.
The yarn you see here is Patons Shetland Chunky. "Color A" is the "Blue Jeans Variegated" color; "color B" is the "Medium Blue" color of this yarn.
Want to crochet your own checkered neck warmer? Be sure to grab our free crochet pattern.