Quick answer

Hand wash bras and underwear in cold water with a gentle detergent, squeeze rather than wring, and line dry away from direct heat. Reserve the machine for sturdy cotton only, always in a mesh bag on a delicate cycle. Heat and agitation are what break down elastic, so cold water and air drying do most of the work.

Sort by fabric, not by color alone

Most bra damage starts in the laundry basket. Microfiber and elastane blends need cooler, gentler handling than cotton-modal blends, so separate them before anything touches water. Keep structured bras away from towels, which shed lint into cups and add weight that stretches bands.

  • Microfiber and elastane bras: hand wash or mesh bag, cold only.
  • Cotton and modal blends: machine delicate is acceptable in a bag.
  • Never mix bras with towels, jeans, or anything with zippers and hooks.

Read the care label before you choose a method

Care labels are not legal boilerplate; they tell you what the fabric can survive. On Gossamer, for example, specifies hand wash separately in cold water, non-chlorine bleach only when needed, line dry, and low iron if needed across its bra styles. If a label says hand wash, treat machine washing as a risk you are choosing to take, not a shortcut.

Detergent choice matters more than you think

Standard laundry detergent is built for cotton and soil, not for elastane. Use a gentle or lingerie-specific formula, and skip fabric softener entirely, because it coats fibers and reduces the stretch that makes a bra fit. If you must use bleach, choose non-chlorine and only when the label allows it.

Step-by-step wash routine

  1. 1. Fill a basin with cold water: Add a capful of gentle detergent and swirl it in before the garments go in, so the soap is evenly diluted. Checkpoint: water should feel cool, never warm.
  2. 2. Submerge and soak for 10 to 15 minutes: Let bras and underwear sit without scrubbing. Most odor and body oils lift on their own in cold water. Common mistake: leaving them overnight, which can set odors and weaken fibers.
  3. 3. Gently agitate the cups and bands: Use your fingertips to press suds through the fabric, focusing on the band and underarm area where oils collect. Never twist, scrub, or rub fabric against itself.
  4. 4. Rinse until the water runs clear: Drain and refill with cold water, repeating until no suds remain. Detergent residue attracts dirt and dulls color. Checkpoint: clear rinse water, no slippery feel.
  5. 5. Squeeze, do not wring: Press the garment between your palms or roll it in a clean towel to absorb excess water. Wringing is the fastest way to stretch a band out of shape.
  6. 6. Reshape and line dry: Lay bras flat or hang them by the center gore, never by the straps. Dry underwear on a line or flat rack. Keep everything out of direct sun and away from radiators and dryers.

Fabric facts that shape your wash routine

  • Next to Nothing Micro T Shirt Bra - Champagne: 74% nylon, 26% elastane with a hand wash, cold water, line dry care instruction. The high elastane content is what gives the 4-way stretch, and it is also the first thing heat and wringing will degrade, so cold hand washing protects the fit.
  • Next to Nothing Micro T Shirt Bra - Mauve Chalk: Same 74% nylon, 26% elastane blend and hand wash, cold water, line dry care instruction. Two colorways of the same microfiber construction mean one wash routine covers both, so you do not need separate rules per shade.
  • Cabana Cotton Convertible T Shirt Bra - Black: 54% cotton, 36% modal, 10% spandex with a hand wash, cold water, line dry care instruction. Cotton and modal tolerate a gentler machine cycle better than microfiber, but the label still calls for hand washing, so the mesh bag is a compromise, not a green light.