Why soft fabrics pill (and how SKIMS combats it)

We all know that feeling of frustration when you pull on a favorite piece—something soft, flattering, and confidence-boosting—only to notice little fuzzy balls forming where the fabric rubs. It can seem like the garment is wearing out before you’ve even had a chance to really live in it. Plus, you love it, and hoped it would last.

The truth is, pilling is usually a normal part of owning soft fabrics, especially in the first months of wear. It doesn’t mean your garment is faulty or won’t hold up with some proper care. But other times, pilling it is a quality red flag. The difference comes down to what’s happening at the fiber level, and how your daily life interacts with that fabric.

This guide explains the science of pilling in a way that’s useful for your various wardrobes— loungewear, base layers, bodysuits, sweaters, and everyday essentials.

What’s normal: softness has a break-in period

Some pilling is simply your garment releasing its excess surface fibers. This is especially common with fine, soft, “hairier” natural fibers and low-twist knits.

Normal pilling often shows up in high-friction areas within the first few wears. They tend to be concentrated in places where fabric gets consistently rubbed, such as the underarms, inner thighs, waistbands, and along bag straps. Pilling usually lessens over time, especially after pills are gently removed a few times.

Even premium sweaters can pill early because many luxury fibers like cashmere or natural fibers like wool have a higher amount of exposed fiber ends.

Use Base Layering to Prevent Pilling
A sleek base layer can help reduce friction between fabrics. Wearing a smoothing foundational piece can help manage friction and slow down the pilling process.

• For example, try a close-to-the-body base like a sculpting bodysuit or a fitted brief under cashmere pants.
• Wearing a silky Soft Smoothing Seamless Tee under a sweater lets the sweater’s fabric near the underarm or waistband move more freely
• Similarly, wearing shapewear shorts or Soft Smoothing Seamless Boy Short under a knit skirt or dress may reduce friction near a bag or seat.

Pilling on synthetic fabrics

Synthetic fabrics like polyester or acrylic are quite strong and abrasion-resistant, but that doesn’t mean they never work loose. Friction still pulls fiber ends to the surface, forming a pill, and the strong fibers hold onto pills longer instead of letting them shed naturally.

1. Weaker fibers (many natural fibers): pills form, then eventually break off and shed.
2. Stronger fibers (synthetics): pills form and stay attached, because the fibers don’t snap.

Red flags for quality:

• Pilling that appears very quickly (within one to two wears) and gets worse every wash
• Pills that feel harder, tighter, and more “stuck”
• Persistent pilling where synthetics anchor fuzz from other fibers

Friction zones: when lifestyle comes into play

Pilling patterns are often a window into real life—commuting, working, moving. Your clothes support you through this, but they can still bear the brunt.

Common friction culprits are:

• Inner thighs (thigh rub; constant fabric-on-fabric contact)
• Underarms and bra band areas (where the arm meets the torso)
• Frequent aggressors like seatbelts, crossbody bags, and purse/tote straps
• Desk edges or chairs where sleeves might rub during the day

How SKIMS combats pilling

SKIMS fabrics are engineered for comfort and a smooth feel, and SKIMS knit structure is designed to resist the loose-fiber buildup that leads to pilling.

Here are some of our favorites:

• Fits Everybody: a buttery soft polyamide and elastane blend for a durable, four-way stretch knit that molds to the body without excessive surface friction.
• Cotton: a breathable and balanced knit that helps those fibers stay better anchored, which typically means fewer loose fibers that form pills.
• Soft Smoothing Seamless: Engineered knits like the Soft Smoothing Seamless T‑Shirt are made with continuous knit construction that can reduce weak spots where pills often start.
• Cotton Fleece: These heavier knits are designed for relaxed comfort with structurally stable yarns that help minimize early abrasion.

Because many SKIMS fabrics are balanced for both softness and stretch (elastic recovery), they are less prone to the loose surface fibers that typically lead to pilling. Still, like all soft knitwear, proper care—washing on gentle cycles in cold water and avoiding rougher items—helps preserve the fabric surface over time.

The prevention playbook:

You don’t need complicated routines or to obsess over friction. Small, consistent choices can make a big difference.

1.Why washing well works

Wash smarter Turn items inside out to protect the fabric’s surface, wash in cold water on a gentle cycle to reduce agitation, and avoid overloading the machine since tight packing increases friction. It also helps to keep knits separate from rougher items like denim, zippers, and towels to minimize abrasion.

Air-dry when possible Dryers are high-friction environments. Plus, heat breaks down fibers, leading to the sort of minuscule loose ends that ultimately lead to more friction and pilling. If you have to use a dryer, choose low heat, and remove items promptly for temperature recovery.

Try using a mesh bag for delicate knits It’s a simple barrier that’s meant to reduce various fabric-on-fabric abrasion in the wash.

Consider detergent Some detergents include cellulase enzymes, which can help break down tiny cotton fuzz before it turns into pills. This isn’t necessary for every load, but it can be a smart option for cotton-heavy essentials you wear frequently.

Watch humidity Low humidity can increase static, which can make synthetic fibers stand up and tangle more easily. If winter air makes your clothes cling and crackle, it can actually make certain fabrics pill faster. Add moisture back into the air with a humidifier or by adjusting your home’s humidity settings.

2. Restoration: de-pilling without damage

Removing pills can make a garment look new again. But the method matters. Here are the safest options:

• Fabric shaver (electric depiller): Best for sweaters, knits, and lounge sets. Use light pressure.
• Sweater stone or fabric comb: Good for thicker knits, used gently.
• Lint roller: Helps with loose fuzz, but won’t remove anchored pills.

Warning: over-shaving can thin your fabric. Treat depilling like gentle polishing, not harsh over-stripping. Use a flat surface, keep the fabric taut, and stop when it looks refreshed.

If a piece is delicate or sentimental, you may want to turn to a professional cleaner who can sometimes remove pills more evenly without stressing the knit.

FAQs

Is pilling always a sign of cheap fabric?
Not at all. Many soft, fine fibers like cashmere (especially in a featherweight knit) will naturally pill. Coarse, tightly woven fabrics should pill less, no matter the price.

Will pilling eventually stop?
Natural fibers may pill less over time after their initial shedding, but synthetic-heavy fabrics often continue pilling throughout their life.

Does air-drying help prevent pilling?
Yes, air-drying can help. It avoids all the tumbling friction in a dryer, as well as the high heat that breaks down fibers.

Should I wash sweaters in a mesh bag?
It’s a smart option, reducing abrasion against other garments and their hardware during the wash. If you’re washing your soft knits all together, it’s less necessary—but it’s useful to protect soft fibers.

Why do polyester leggings pill in the inner thigh area?
The high, constant (inevitable) friction of that area, combined with the nature of strong synthetic fibers (which generally hold onto their pills) can anchor pills in place.