Negative Underwear Care Guide 2026: How to Wash Every Fabric, Label by Label

Sunday evening, laundry basket on the hip. A sheer mesh bra, a glossy strapless, two pairs of modal briefs, a washable-silk cami and a cashmere-blend tee all land in the same pile. Ten minutes later they could be tumbling together on hot, which is exactly how a $78 bra ends up with a bent wire and a $150 tee ends up child-sized.

Negative Underwear is unusually specific about how its pieces should be washed and dried. The trouble is that the instructions are scattered across dozens of product pages and a Help Center, and they don't always match each other. Olivia Reviews collected every care line we could find on negativeunderwear.com in October 2026 and organized them into one routine, fabric by fabric.

Quick take: Negative's general rule is simple: hand wash bras in cold water with a delicate detergent, machine wash most underwear and lounge on cold or delicate, and lay things flat to dry. Individual labels then fine-tune it, with a few bras and lounge pieces allowed in the machine or even the dryer. If you're stocking up, see today's Negative Underwear deals first.

The House Rules From Negative's Help Center

The brand's "Wear & Care" section opens with a reasonable promise: its materials aren't so delicate you can't wear them every day, but "the more delicate you treat them, the longer they'll last." Here's what it says, in plain terms:

Bras: hand wash in cold water with a delicate detergent. The brand explains why: wires can pop in machines, "sometimes in as little as one wash," and regular detergent can fray fine fabrics.
Underwear, Whipped, Club, Supreme and Island pieces: machine wash cold or on delicate, then lay flat to dry.
Swim: hand wash in cold water and lay flat to dry.
Rotation: give bras a rest, rotating them every other day or so, so the elastics have time to readjust. Negative suggests keeping a handful of favorites in rotation, even duplicates.

Then come the individual labels, which are where things get interesting.

Sieve: The Sheer Mesh

Negative Sieve Demi Bra in Shell pink sheer mesh — The Sieve Demi Bra in Shell, an underwire style in Belgian power micromesh ($78). Image: Negative Underwear.

Sieve is Negative's Belgian power micromesh, 74% polyamide and 26% elastane. Almost every Sieve label we read says to keep it out of the dryer and dry it flat, but the water temperature varies: the Sieve Non-Wire Bra says hand wash cold, the underwire Sieve Demi says hand wash warm, and the Sieve Longline allows a delicates cycle on cold. With an underwire like the Demi, hand washing matters most, given the brand's warning about wires and machines.

Glacé: The Glossy Stretch Nylon

Negative Glacé Strapless Bra in Buff — The Glacé Strapless Bra in Buff, with thin memory foam pads ($78). Image: Negative Underwear.

Glacé is a Belgian stretch nylon (77% nylon, 23% elastane) with a silk-like sheen. The Glacé Strapless Bra page says to hand wash in warm water and hang dry, and adds a specific warning: avoid squeezing or wringing out the cups, because they're memory foam. The same gentle squeeze-don't-twist approach makes sense for the Glacé Stealth Mini Bra, which has molded foam triangle pads and is also labeled hand wash warm, hang dry. The wireless Glacé Plunge Bra is more relaxed: machine wash warm, hang dry.

Whipped: The Micro Modal

Negative Whipped Henley Dress in Ganache brown — The Whipped Henley Dress in Ganache, 91% micro modal and 9% Lycra ($198). Image: Negative Underwear.

Whipped is the brand's Austrian micro modal with a drop-needle stripe. Here the labels split by item. The Whipped French Cut Brief says wash on delicates or cold, dry flat, no bleach. The Whipped Bralette and the Whipped Henley Dress allow a warm machine wash, no bleach, a low tumble dry and a cool iron. If you mix Whipped pieces in one load, cold and delicate covers both sets of instructions.

Cotton and Base: The Everyday Workhorses

These are the easiest pieces in the drawer. Cloud Cotton (79% cotton, 21% elastane) is labeled machine wash warm, tumble dry low on items like the Cloud Cotton Bralette and Nursing Bra. Base, the bonded no-show fabric used for the Base Smoothing Short, Base Front Close Bra and Base Ballet Bodysuit (50% nylon, 50% Lycra), is also machine wash warm, no bleach, tumble dry low.

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Lounge and Sleep: Waffle, Supreme and Washable Silk

Negative Waffle Knit Zip-Up Hoodie in navy — The Waffle Knit Zip-Up Hoodie in Navy, 98% cotton and 2% spandex ($190). Image: Negative Underwear.

Waffle Knit (cotton waffle jacquard): machine wash cold with like colors, turn inside out, tumble dry low.
Supreme (the brand's high-density woven poly, called its washable alternative to silk): machine wash cold, no bleach, hang dry, cool iron.
Eclipse Washable Silk (17mm mulberry silk): machine wash cold, dry flat, cool iron, or dry clean.
Club (cotton and modal): machine wash on delicate or cold, tumble dry low.

The Hand-Wash-Only Luxuries

Negative Slink Bodysuit in black — The Slink Bodysuit in Black, a double-knit twisted viscose ($248). Image: Negative Underwear.

A few of Negative's priciest pieces ask for the most patience. The Slink Bodysuit (80% viscose, 20% elastane) is hand wash cold, no bleach, dry flat, cool iron or dry clean. The Silk Cashmere Cardi ($275, 85% silk and 15% cashmere) is hand wash cold, dry flat.

Negative Fino Featherweight Cashmere Boyfriend Tee in cream — The Fino Featherweight Cashmere Boyfriend Tee in Cream, an Italian cashmere blend ($150). Image: Negative Underwear.

The Fino Featherweight Cashmere Boyfriend Tee, an Italian cashmere blend of viscose, nylon, cashmere and elastane, is labeled hand wash warm, dry flat. Swimwear rounds out this group: the Swim Strappy One-Piece page says hand wash cold, dry flat, no bleach.

Cheat Sheet: Negative Care at a Glance

Fabric / piece	Wash	Dry
Sieve bras	Hand wash (cold or warm, per label)	Dry flat
Glacé Strapless / Stealth Mini	Hand wash warm; don't wring foam cups	Hang dry
Glacé Plunge	Machine wash warm	Hang dry
Whipped French Cut Brief	Delicates or cold, no bleach	Dry flat
Whipped Bralette, Henley Dress	Machine warm, no bleach	Tumble low; cool iron
Cloud Cotton, Base	Machine warm	Tumble low
Waffle Knit	Machine cold, inside out	Tumble low
Supreme	Machine cold, no bleach	Hang dry; cool iron
Eclipse Washable Silk	Machine cold, or dry clean	Dry flat; cool iron
Slink, Silk Cashmere, Fino	Hand wash	Dry flat
Swim	Hand wash cold	Dry flat

When to Replace (According to Negative)

The Help Center is refreshingly blunt about lifespan. It says unlined underwire bras have a shelf life of about 12 months with good wear and care, and suggests replacing bras yearly, the same way you'd replace a favorite white tee. Underwear runs on roughly the same 12-month cycle; if a pair is fraying, stained, stretched out or has holes, it's time.

Care Starts Before the First Wash

Because returns must be unworn, unwashed and tagged, Negative asks shoppers to try pieces on without self-tanner, lotion, oil or fragrance, and to try underwear, bodysuits and swim over their own underwear. Keep tags on until you're sure. The brand's Help Center lists returns or exchanges up to 30 days after ordering, free exchanges and store credit, and a $5 restocking fee for refunds to the original payment method; sale items are final sale or exchange only, as marked.

Spend Less on Your Rotation

Buy packs if you want duplicates for rotating, like the Sieve Non-Wire Bra 2-pack at $119 (compare-at $140).
Cross $100 for free U.S. shipping.
Use the "Give $20, Get $20" referral program linked in the site footer.
Check the current Negative Underwear coupon page for anything new.

Negative Care FAQ

Can Negative bras go in the washing machine?

The Help Center says bras should be hand washed in cold water. A few labels, such as the Glacé Plunge, Whipped Bralette and Cloud Cotton styles, allow machine washing, so check the tag on each one.

Can I use the dryer?

Only where the label says so, like Whipped Bralettes, Base and Cloud Cotton pieces and Waffle Knit. Sieve, Glacé, Supreme and the silks are dried flat or hung.

Is the washable silk really machine washable?

Yes, according to its label: machine wash cold, dry flat, cool iron, or dry clean.

How should I treat the strapless bra's foam cups?

Hand wash warm, hang dry, and don't squeeze or wring the cups.

The Laundry-Day Verdict

Negative gives you more care information than most lingerie brands, and following it is mostly about sorting. Bras go in a basin, cottons and Base go in the machine, lounge pieces follow their labels, and the silks and cashmeres get the gentlest treatment. Rotate your bras, keep the dryer for the pieces that allow it, and your drawer should look good for the full year the brand suggests. Before you restock, compare Negative Underwear offers.

→ Check the latest Negative Underwear coupon codes and deals

Olivia Reviews researched Negative Underwear using its official website, product listings and published policies in October 2026. We haven't personally tested these products. We may earn a commission when you buy through our links, at no extra cost to you.