How To · Fashion · Care
The Right Way to Care for Wool, Cashmere, and Delicate Knits
Delicate knits demand a different approach than everyday laundry—but the process is simpler than you think. Learn the exact steps to preserve fiber quality and prevent shrinkage, pilling, and stretching.
5 min read · IrisWool and cashmere aren't fragile—they're resilient fibers that actually improve with minimal washing. The catch: they require a gentler hand than your everyday cottons. Improper care leads to the holy trinity of knit disasters: shrinkage, pilling, and that dreaded stretched-out shoulder seam.
This guide walks you through hand-washing, proper drying, and storage methods that take less time than a machine cycle and cost almost nothing. Your sweaters will thank you by staying soft, holding their shape, and lasting a decade instead of two seasons.
Wool doesn't need washing after every wear—air it out between wears and wash only when visibly soiled or after 3–5 uses.
What you'll need.
- 01Basin or sink
- 02Wool-specific soap or gentle castile soap
- 03Cool water
- 04Clean, dry towels
- 05Mesh sweater drying rack (optional but recommended)
- 06Breathable storage bag or drawer
- 07Cedar chips or lavender sachets (optional)
Step one · 3 minutes
Fill a basin with cool water and wool-specific soap
Use a sink, basin, or bathtub filled with cool water (around 65–70°F). Add a teaspoon of wool wash or gentle castile soap—never standard detergent, which strips natural oils. Avoid hot water, which causes fibers to swell and lock into a shrunken state. Stir gently to distribute soap evenly before submerging your garment.
Wool wash brands like Soak, The Laundress, or Ecos are worth the small investment; one bottle lasts months.
Step two · 10 minutes
Submerge and soak without agitation
Place your folded sweater into the soapy water and press down gently to submerge fully. Let it soak for 10 minutes—this allows the soap to lift dirt and oils without you having to scrub. Resist the urge to wring, twist, or rub the fabric. If there are visible stains, gently press the soapy water through that area with your fingertips rather than scrubbing.
Fold your sweater lengthwise before soaking to minimize surface area exposure and reduce stretching risk.
Step three · 5 minutes
Rinse with cool water until soap clears
Drain the soapy water and refill your basin with fresh cool water. Submerge the sweater again and gently press the clean water through the fibers. Repeat this rinse 2–3 times until the water runs clear and you see no soap residue. Each rinse should be gentle pressing motions, never wringing or twisting.
If your tap water is very hard, add a splash of white vinegar to the final rinse to restore softness and remove mineral buildup.
Step four · 2 minutes
Remove excess water by rolling in a towel
Lay a clean, dry towel flat and place your wet sweater on top, still folded. Roll the towel and sweater together gently—don't wring—to squeeze out excess water. This removes moisture without stretching the fibers. You can repeat with a second dry towel if needed. The goal is damp, not dripping.
Use a white or neutral towel to avoid any dye transfer, especially with lighter-colored knits.
Step five · 10 minutes active, then air-dry
Lay flat to dry on a clean, breathable surface
Unroll your sweater and lay it flat on a clean, dry towel or mesh drying rack in a well-ventilated area. Gently reshape it to its original dimensions—smooth out wrinkles and straighten the neckline, cuffs, and hem. Avoid direct sunlight and heat sources like radiators or dryers. Flip it halfway through drying (after 2–3 hours) to ensure even moisture evaporation. Drying typically takes 12–24 hours depending on fiber thickness and humidity.
A mesh sweater drying rack ($10–$20) is worth the investment if you hand-wash frequently; it allows air circulation from both sides.
Step six · 2 minutes
Store folded, not hung, in a breathable container
Once fully dry, fold your sweater neatly and store it in a drawer, shelf, or breathable cotton storage bag. Never hang knits on hangers, which stretches the shoulder seams and creates permanent divots. If storing long-term, place a sachet of cedar chips or lavender in the container to deter moths—avoid mothballs, which leave a chemical odor.
Refold your sweaters every few months to prevent permanent creases and ensure even settling.
How to know your knits are properly cared for.
A well-maintained sweater feels soft and holds its shape wash after wash. You'll notice the neckline stays snug, the cuffs don't sag, and the fabric resists pilling. Over time, wool actually softens further—a sign you're doing it right.
Questions at the mirror.
My sweater shrank. Can I fix it?
Partially, yes. Fill a basin with cool water and add a tablespoon of hair conditioner or glycerin. Soak the shrunken sweater for 15 minutes, then gently stretch it back to its original dimensions while damp. Lay flat to dry. This works best on minor shrinkage; severe shrinkage is difficult to reverse.
How often should I actually wash wool and cashmere?
Less than you think. Wool is naturally antimicrobial and resists odor. Wash after every 3–5 wears, or when visibly soiled. Between washes, hang the sweater in fresh air or lay it flat to air out. Cashmere can go even longer—sometimes 5–10 wears—before washing.
What if my sweater has a stain?
Treat it immediately before washing. Blot (don't rub) the stain with a damp cloth and a tiny drop of wool wash. Let it sit for 5 minutes, then gently press clean water through the area. Once the stain lifts, proceed with the full hand-wash process.
Can I use a washing machine on delicate cycle?
Technically yes, but hand-washing is safer and takes only 25 minutes. If you must use a machine, use a mesh laundry bag, delicate cycle, cold water, and wool-specific detergent. Skip the spin cycle and lay flat to dry.