Hoodies used to be one thing: a shapeless grey rectangle with a hood sewn on, bought a size up so it would "fit anyone" and in practice fit no one well. That's shifted properly in the last few years. Fit has caught up with how women actually want to wear them, so you can now find a hoodie cut with a waist, a hoodie cropped on purpose rather than by accident, one with a zip that sits flat instead of digging into your sternum every time you sit down. On the whole that's a good thing, though it does mean you now have to actually try the thing on rather than grab whatever's folded nearest the till.
Before you buy, look past the colour and check the bits that tell you how it'll behave after a few washes. Pull the cuffs, see if the ribbing has any give left in it or if it's already slack. Check the hood, some are cut so small they perch on the back of your head like a hat, others swallow your whole face and block your side vision on a windy platform. Look at the drawstring ends, metal or proper plastic tags last, the cheap waxy cord ones fray within a month and then you're threading a shoelace through a hoodie, which nobody should have to do twice in one winter. And check the hem, a straight cut hoodie rides up every time you reach for something on a high shelf, while an elasticated or ribbed hem stays put.
If you've got none in the current rotation, start with a relaxed, mid weight cotton one in a neutral colour, not the cropped version, not the deliberately oversized one. It layers under a coat, sits over leggings without clinging to your hips, and doesn't announce itself either way, which matters when you're building from nothing. The cropped and oversized versions are worth having eventually, but they're the second and third purchase, not the first.
This is the piece you reach for on a proper day off, the school run in the rain, a long car journey, fourth quarter of the year when everything else in the house is still packed away for winter. A well made one earns that constantly, through brushed loopback cotton that doesn't bobble, flatlock seams that don't rub under your arms, and a hood that holds its shape instead of flopping like wet cardboard by October. The disappointing ones go thin and shiny at the elbows within a season and the drawstring vanishes into the hem the first time you tug it too hard.
Reach for it the moment getting properly dressed feels like one step too many.