Soo, this isn't very original, I just found a stolen skin on skindex and re-made it (as someone else did but I forgot who), this didn't turn out too bad in my opinion c:

It's called summer sweater because in the southern hemisphere, it'll be summer for christmas. In the northern hemisphere, it'll be winter. So everyone in the northern hemisphere will be wearing sweaters ect, while it's summer for us. Btw, sorry if that's hard to understand, I'm horrible at explaining haha