How To · Fashion · Care
Prevent Pilling on Wool and Cashmere Before It Starts
Pilling happens when fibers break and tangle, but you can prevent most of it with smart washing, storage, and wearing habits. Here's exactly what to do.
5 min read · IrisPilling—those annoying fuzzy balls that form on wool and cashmere—isn't a sign of poor quality. It's a natural consequence of fiber friction. What matters is that most pilling is preventable. The key is understanding where friction happens and eliminating it before those loose fibers tangle into visible pills.
Whether you're protecting a $40 merino sweater or a $400 cashmere cardigan, the same principles apply: reduce friction during wear and washing, store thoughtfully, and address problem areas before they become visible. This guide walks you through every practical step.
Pilling isn't a defect—it's friction. Stop the rubbing, stop the pills.
Step one · 1 minute
Identify high-friction zones on your body
Pilling happens where your sweater rubs against itself or other surfaces most: underarms, the sides of your torso where your arms swing, the inner elbows, and the area where your backpack or bag strap sits. These are your problem zones. Before wearing a new wool or cashmere piece, mentally map where friction will occur. This awareness alone helps you make smarter wearing choices.
Pay special attention to areas where seams meet—these are structural weak points where fibers break more easily.
Step two · 2 minutes
Wash in cold water on a gentle cycle, inside out
Machine washing is fine for most wool and cashmere if you use the right settings. Turn the sweater inside out before washing—this protects the outer surface from friction against the drum and other garments. Use cold water and a gentle or wool-specific cycle. Avoid the regular cycle entirely; it agitates fibers too much. If hand-washing, use cool water and handle the sweater gently without wringing or twisting.
Use a mesh laundry bag for extra protection, especially if washing multiple items together.
Step three · 2 minutes
Dry flat, never in the dryer
Heat and tumbling are pilling's best friends. Skip the dryer entirely. Instead, lay the sweater flat on a clean, dry towel to air dry. If you need to speed things up, roll it gently in the towel to remove excess moisture, then lay it flat again. This prevents stretching and fiber stress. Make sure the sweater is fully supported so gravity doesn't pull it out of shape while damp.
If your sweater is still damp after 24 hours, gently reshape it and move it to a spot with better air circulation.
Step four · 2 minutes
Fold and store with breathable separation
Hanging wool and cashmere stretches them out over time. Fold instead, and store in a cool, dry drawer or shelf. Use acid-free tissue paper or cotton cloth between folded pieces to prevent them from rubbing against each other during storage. Cedar blocks or lavender sachets add protection without the chemical smell of mothballs. Keep sweaters away from direct sunlight, which can weaken fibers.
Refold your sweaters every few months to prevent permanent creases and to redistribute any stress on the fibers.
Step five · 1 minute
Wear a base layer under high-friction pieces
If you know a sweater will rub against your skin or bag straps all day, add a thin base layer underneath. A lightweight long-sleeve tee or merino base layer creates a buffer between your sweater and the friction source. This is especially useful for cardigans worn over shirts or sweaters under backpack straps. The base layer takes the wear, not your expensive piece.
Choose smooth, tightly-woven base layers over fuzzy or textured ones—they create less friction themselves.
Step six · 2 minutes
Brush gently if pills do appear
If you spot a few pills despite prevention, don't panic. Use a soft-bristled garment brush or a specialized fabric shaver on the lowest setting, moving in one direction only. Brush gently—you're removing the pill, not the fiber underneath. A cashmere comb works well too. For stubborn pills, a fabric shaver is faster, but test it on an inconspicuous area first. Never pick pills off with your fingers; you'll damage more fibers.
Brush your sweater every few wears as preventive maintenance, especially in the first month of ownership when new fibers are most likely to pill.
How to know it works.
A well-maintained wool or cashmere sweater should show minimal pilling even after a full season of wear. You'll notice the difference within the first few washes and wears if you're following these steps consistently.
Questions at the mirror.
Is pilling a sign the sweater is low quality?
Not necessarily. Even high-quality wool and cashmere can pill slightly, especially in the first few wears. Lower-quality pieces may pill more aggressively, but pilling itself is about fiber friction, not always about price. Premium fibers are often longer and stronger, which can actually reduce pilling over time.
Can I prevent pilling on a wool sweater I already own?
Absolutely. Start with the washing and storage steps immediately. If pills have already formed, use a fabric shaver or brush to remove them, then follow the prevention protocol going forward. The sweater won't get worse if you change your care habits now.
Is hand-washing always better than machine washing?
Not if you do it wrong. Aggressive hand-washing with wringing and twisting causes more damage than a proper gentle machine cycle. If your machine has a wool or delicate setting, use it. Hand-wash only if you prefer the control, but be very gentle.
What's the difference between a fabric shaver and a brush?
A brush is gentler and better for regular maintenance. A fabric shaver removes pills faster but can damage fibers if used too aggressively. Use a brush for prevention; use a shaver only when pills are already visible and you want quick removal.