The nursing-wear aisle has a house style, and it is not most people's. Soft greys, discreet navy, a great deal of jersey, everything vaguely apologetic. It's clothing designed around a function rather than around you, and after a few months of it, a lot of people quietly stop feeling like themselves.
The good news is that the function is not difficult. Fabric has to move aside. That's the whole requirement. And an enormous number of ordinary clothes already do it — they're just not marketed to you, because nobody makes money from telling you that the shirt in your wardrobe already works.
The two-layer trick
Before the shapes, the principle, because it unlocks most of them.
Wear a stretchy vest or a soft bralette under whatever you like. The outer layer lifts or opens; the under layer stretches aside and keeps your middle covered. That's the same mechanism the expensive double-layer nursing tops use, assembled yourself, out of things you own.
It costs almost nothing, it works under about half your wardrobe, and it means the outer garment can be anything — which is the point.
Shapes that already work
The wrap dress. The single most useful garment of this entire period, and it was never sold as nursing wear. It ties at your narrowest point, adjusts as your size moves, opens at the front, and looks like an actual dress. If you buy one thing this year, buy a wrap dress in a fabric you like.
Crossover and surplice tops. The same idea as a wrap without the tie. Ordinary, flattering, opens by being moved rather than undone.
Button-down shirts. Undo from the bottom up rather than the top down. Works, costs nothing to test, and reads as properly dressed — which makes it the obvious option for work.
Anything with a wide or scooped neckline in a stretchy knit. A soft ribbed top with give in the neckline pulls aside without complaint. Look for real stretch and a neckline that recovers its shape, not one that stays stretched out afterwards.
Loose, boxy knits over a vest. Lift and go. The looser the outer layer, the less it clings while it's up.
Anything that buttons or ties at the front, essentially. Once you start looking for front openings you see them everywhere.
Shapes that don't, whatever the label says
Anything that only opens from the top. Back zips, high funnel necks, polo necks, one-piece jumpsuits. A jumpsuit is a full undressing.
Tight, structured bodices. Fitted shirt dresses that gape at the bust, boned or heavily structured tops. These get less comfortable, not more.
Delicate fabrics. Silk, anything dry-clean only, anything that shows a water mark. This is a phase with leaks in it and the best fabric is one you can throw in the machine without thinking.
Very fine, pale knits. They show everything, in both senses.
The layer that does the heavy lifting
If there's one thing to buy deliberately, it's a long cardigan or open duster.
It covers the sides while you feed, which is what most people actually want rather than a full cover. It adds a long vertical line that makes everything underneath look more deliberate. It goes over any of the shapes above. And it's the difference between two basics and an outfit, on the mornings when you have four minutes.
What to look for on the label
Mid-weight cotton jersey, ribbed cotton, viscose blends with elastane, modal. Washable at forty. Enough weight that the fabric hangs rather than clings — thin jersey is the single most common disappointment, because it looks fine on a hanger and shows every line on a body.
Mid-tones and prints hide marks far better than flat black or flat white, both of which show everything. A busy print is not a style compromise here, it's a practical decision.
On buying nursing wear anyway
None of this is an argument against buying proper nursing clothes. A good double-layer top is genuinely better engineered than anything you'll improvise, and one or two of them are worth having for the days you need it to be easy.
The argument is against buying a wardrobe of them. Feeding lasts months, and a wardrobe bought entirely for a function you'll stop needing is money that buys you nothing afterwards. Two or three properly-made nursing pieces, plus a set of ordinary clothes that happen to open, will serve you better and still be in your wardrobe next year.
That's the whole 9Edits argument, really, pointed at a different stage: buy for the shape, not for the label.