Sweatshirts are the best shirts?

I'm seriously always cold these days and these are just some sweatshirts I'm finding it hard to live without :( (oh the dramatics, I know!)

1// River Island Tie-Dye 2// River Island NYC 3// TopShop Grey Sweatshirt 4// French Connection Ditton

P.S. And two more that I'm eying also
 Zara Floral
 UO Green Sweatshirt