How To · Fashion · Care & Storage
How to care for and store wool and knit sweaters so they last for years
A quality sweater deserves better than a washing machine spin cycle. Learn the specific moves that keep wool and knits looking fresh without the shrinkage, pilling, or mysterious holes.
5 min read · IrisSweaters are weekend armor, but they're also delicate. Wool and knits need a different approach than your everyday cotton tee—throw them in the dryer and you'll watch them shrink to doll size. The good news: proper care is straightforward, requires no special equipment, and extends the life of your favorite pieces by years.
Whether you're dealing with a luxury cashmere blend or a sturdy merino wool crew neck, the fundamentals are the same: gentle washing, flat drying, and smart storage. Here's how to keep your sweaters looking intentional, not tired.
Flat drying is non-negotiable—hanging stretches the fibers and creates permanent shoulder bumps.
What you'll need.
- 01Wool-specific detergent (The Laundress, Woolite Delicates, or Ecos)
- 02Two clean, white towels
- 03Mesh drying rack (optional but helpful for heavy knits)
- 04Sweater stone or lint brush for pilling
- 05Cedar blocks or sachets for storage
- 06Breathable cotton storage bag
Step one · 3 minutes
Check the label and spot-test for color bleeding
Read the care tag first—some sweaters are dry-clean only, and forcing them into a home wash will damage them. For hand-washable pieces, fill a sink with cool water and add a drop of wool-specific detergent. Dunk a hidden corner (inside seam, underarm) in the soapy water for 30 seconds, then rinse. If dye bleeds into the rinse water, dry-clean instead. If it's clear, you're safe to proceed.
Wool-specific detergent (like Woolite Delicates or The Laundress Delicate Wash) has pH balanced formulas that prevent felting and fiber damage.
Step two · 5 minutes
Hand-wash in cool water with gentle agitation
Fill your sink with cool water (cold or lukewarm, never hot—heat shrinks wool). Add a teaspoon of wool detergent and swish to dissolve. Submerge the sweater and gently squeeze the soapy water through the fibers for 3–4 minutes. Don't wring, twist, or scrub. Focus on underarms and neckline where body oils accumulate. Drain the sink and rinse the sweater under cool running water, squeezing gently, until the water runs clear (usually 2–3 rinses).
If your sweater smells stale but isn't visibly dirty, skip washing and air it outside for a few hours instead—many sweaters only need occasional washing.
Step three · 2 minutes
Remove excess water without wringing
Press the sweater gently against the sink wall to release water. Lay it flat on a clean, dry towel and roll the towel up like a burrito, pressing gently as you roll. This absorbs water without stretching the fibers. Unroll and transfer the sweater to a fresh, dry towel. Never wring, twist, or hang—both actions distort the shape.
Use white towels to avoid any risk of dye transfer onto your sweater.
Step four · 15 minutes (hands-off drying time)
Flat-dry on a clean, breathable surface
Lay the damp sweater flat on a clean, dry towel or mesh drying rack in a well-ventilated area away from direct sunlight and heat sources. Gently reshape it to its original dimensions—smooth out wrinkles, even out the sleeves, and make sure the neckline isn't bunched. If your sweater is heavy (like chunky knits), prop it on a mesh rack so air circulates underneath. Flip it halfway through drying (usually after 8–12 hours) to ensure even moisture loss. It should be fully dry within 24 hours.
Never hang a wet sweater—the weight of the water will stretch the shoulders and create permanent bumps.
Step five · 5 minutes
Pilling removal and pre-storage prep
Once dry, check for pilling (those fuzzy balls that form on high-friction areas like underarms and cuffs). Use a sweater stone, lint brush, or fine-toothed comb to gently remove pills—don't pull aggressively or you'll damage the fibers. For stubborn pills, a fabric shaver works, but go slow. Inspect seams and hems for loose threads and snip any that stick out. Now your sweater is ready to wear or store.
Pilling is normal and doesn't mean low quality—it happens to all fibers, especially merino and cashmere blends. Regular removal keeps sweaters looking fresh.
Step six · 2 minutes
Store folded with moth prevention
Fold your sweater neatly (don't hang) and store it in a breathable cotton bag or on a shelf in a cool, dry closet. Never use plastic, which traps moisture and encourages mold. Place cedar blocks, cedar sachets, or lavender sachets in the storage area to deter moths. If storing for the season, refresh the cedar every 3 months. Keep sweaters away from direct sunlight, heat vents, and damp areas.
Cedar and lavender are natural moth deterrents. Mothballs work but leave a chemical smell that's hard to remove.
How to know your sweater is properly cared for
A well-maintained sweater should feel soft, hold its shape, and show minimal pilling. The neckline and cuffs shouldn't be stretched or saggy, and there should be no musty odors or visible moth damage.
Questions at the mirror.
My sweater shrank after washing. Can I fix it?
Partially, yes. Fill a sink with cool water and add a tablespoon of hair conditioner or glycerin. Soak the sweater for 10 minutes to relax the fibers, then gently stretch it back to size while wet. Lay flat to dry. This works best on minor shrinkage; severe shrinkage is usually permanent.
How often should I actually wash my sweater?
Only when visibly soiled or after 3–5 wears. If it just smells stale, hang it outside for a few hours instead. Overwashing accelerates wear and increases the risk of damage.
Can I use regular laundry detergent?
No. Regular detergent is too harsh and can strip natural oils from wool, making it brittle and prone to pilling. Wool-specific detergent has a gentler pH balance designed for delicate fibers.
What's the difference between wool and cashmere care?
Cashmere requires the same gentle hand-washing and flat-drying, but it's more delicate. Use a cashmere-specific detergent if possible, and avoid any agitation. Store cashmere in breathable bags with cedar to prevent moths, as cashmere is a moth magnet.