I used to have some big, cozy, hideous looking ones, but they all went out long ago when I argued I didn't need them and if I got cold then I should just put on a sweater.
However, I've come to realize that lounge wear is just as important as any other type of apparel and a really chic sweatshirt needs to come into my possession.
These are a few I've got my eye on:
Hive & Honey Striped Pullover Sweatshirt, $49 at Piperlime
Fuzzy Popover, $50 at Aerie
Mint Sherpa Hoodie, $17 (on sale) at Target
MNG By Mango Sequin Shoulder Sweatshirt, $45 at JCPenney