Three pair pack offers the best value. Burlington stands by it's reputation of knitting comfortable, durable socks by putting a green seam by the toe. A cotton rich blend allows the feet to "breath" thus eliminating sweat and odor.
Anyone with a history of foot odor or athletes foot can attest to the importance of cotton socks. The more cotton, the merrier. The flipside is that cotton socks without the benefit of nylon is less durable. It is advisable to alternate socks as much as possible.