If you don't want to ask them, stop by the school after it lets what brands and styles the kids are wearing.
I have given up trying to be cool and buy clothing for my kids.
One DD likes Adidas stuff, the other Northface and Uggs (I bought her EMU Australia ones for Christmas after years of telling her to be satisfied with FUGGS- fake Uggs).
And the Abominable Snowman looks appears to be in right now.
https://farm4.staticflickr.com/3235/3119122666_6d11569a25_b.jpghttps://shop.nordstrom.com/s/thread-supply-
wubby-fleece-pullover/4656809?origin=keywordsearch-personalizedsort&breadcrumb=Home%2FAll%20Results&color=indigo