Because 5 Ricks are better than one Rick.

Although one Rick would probably disagree -- he would immediately assert himself as the superior Rick.

Anyway, there's a Multiverse, and an infinite number of Ricks living in a Rick-tastic world with their lovingly defeatist Mortys (Morties?). 

Who rules over said Rick-tastic word? Why, the Council of Ricks!

Our Rick & Morty Council of Ricks Low-Cut Socks 5-Pack features 5 unique council members from unique universes filled with said unique Ricks.

Made from soft and stretchy cotton and polyester, these ick and Morty socks are...uh...Rickeriffic!