Pathfinder: "Pathfinder Society Year of the Sky Key T-Shirt" [RPG]

I got this shirt for my kid because I was either too big or too small for the sizes left.  I have only a vague idea of what the Sky Key is, and he has absolutely no idea, but he told me to give the shirt 10 out of 10.  I've used my mastery of fractions to change that to 5 out of 5 stars for the Paizo website.  To me, the symbol is pretty forgettable compared to other Pathfinder shirts, but, it's not my opinion that counts!