Quick answer
Fasten every bra hook, fold moulded cups so they keep their shape, and place bras and knickers in a fine-mesh laundry bag no more than two-thirds full. Wash on a cold, gentle cycle with a small amount of mild detergent, then air-dry the bag's contents flat or hanging. The bag is not a licence to wash hot: it stops snagging and tangling, but heat and tumbling still break down lace and elastic.
laundry bag
Pick the right bag before you pick the cycle
A delicate laundry bag only works if the mesh is fine enough to stop a bra hook escaping and coarse enough for water to move through. Look for a fine-mesh bag with a covered or recessed zip, because exposed metal zips scratch lace and catch on other laundry. Size matters too: a bag that is too small forces cups to fold under pressure, while an oversized bag lets items tumble loose inside it.
- Fine mesh for bras and lace; a slightly coarser mesh is fine for cotton knickers.
- A zip guard or fabric flap over the pull, so metal never touches fabric.
- One bag per load type: bras in one, knickers in another, to stop hooks catching waistbands.
Prep each item before it goes in the bag
Most laundry-bag damage happens before the bag is zipped. Close every hook-and-eye row on bras so the hooks cannot grab lace or knit fabric, and loosen straps rather than leaving them twisted. For knickers, shake out folds and check that no item is inside another. If a bra has moulded or padded cups, stack them so cups nest inside each other rather than flattening against the mesh.
- Fasten bra hooks and adjust straps so they lie flat.
- Turn lace knickers inside out to reduce surface friction against the mesh.
- Never mix a wet swimsuit or heavy item into the same bag as lace.
Load the bag loosely and choose a gentle cycle
Fill the bag to about two-thirds capacity. A packed bag stops water and detergent circulating, so soil stays in the fabric, and the pressure of a full bag can crease cups and stretch elastic. Use a cold or cool wash with a mild detergent, and skip fabric softener, which coats fibres and reduces the stretch recovery of elastic over time. If your machine has a delicates or hand-wash setting, that is the one to choose.
- Two-thirds full is the working maximum; half full is better for structured bras.
- Cold water protects elastic and colour; heat is the main cause of stretched-out bands.
- Skip the spin cycle at high speed if your machine allows a separate setting.
Dry the contents without undoing the protection
Take items out of the bag as soon as the cycle ends. Leaving damp lace in a closed bag encourages odour and can leave creases that are hard to press out. Reshape cups by hand, then dry bras flat or hang them by the centre gore rather than by the straps, which stretch under the weight of a wet bra. Knickers can hang or lie flat; either way, keep them out of direct sun and away from radiators.
- Never tumble-dry lace or moulded cups, even inside a bag.
- Reshape cups while damp; once dry, the shape is set.
- Air-dry in a ventilated space rather than a closed cupboard.
The laundry bag routine, step by step
- 1. Fasten and check: Close every bra hook, loosen twisted straps, and turn lace knickers inside out. Mistake to avoid: leaving hooks open, which turns the bag into a snag trap.
- 2. Bag by type: Put bras in one fine-mesh bag and knickers in another, filling each to about two-thirds. Checkpoint: you should be able to press the bag flat with your palm.
- 3. Wash cold and gentle: Use a delicates or hand-wash cycle, cold water, and a small amount of mild detergent. Skip softener. Mistake to avoid: a hot or heavy cycle, which undoes the bag's protection.
- 4. Unbag immediately: Remove items as soon as the cycle ends and reshape damp cups by hand. Checkpoint: nothing should sit damp inside a closed bag.
- 5. Dry flat or hang by the gore: Air-dry bras flat or by the centre gore, and hang or lay knickers flat away from direct heat. Mistake to avoid: drying by the straps or tumble-drying lace.
Delicates that benefit from a bag
- ZigZag Lace High Rise Brief - Spearmint: The ZigZag Lace High Rise Brief sits softly and slightly higher at the waist with generous back coverage, and is made to stay in place all day without digging, rolling, or riding up. A high-rise brief has more fabric and a wider waistband to protect, so bagging it separately keeps the waistband from twisting around bra hooks in the wash.
- ZigZag Lace Original Brief - Night Fog: The ZigZag Lace Original Brief sits at the low hip with ample back coverage and a delicate lace trim. Lace trim is the first thing to snag, so a fine-mesh bag is the simplest way to keep the trim intact without hand-washing every pair.
- Eco Lace Double Layer Plunge Bra - Black: The Eco Lace Double Layer Plunge Bra has a plunging neckline and is crafted from buttery TENCEL fibres and 85% recycled lace. A structured plunge bra needs its cups nested and its hooks fastened before bagging, so the lace and the shape both survive the cycle.
