Wool Care: How to Wash Your Wool Sweater Without Shrinking It

Article published at: May 28, 2025 Article tag: In Care
Wool Care: How to Wash Your Wool Sweater Without Shrinking It
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How to Wash Your Wool Sweater Without Shrinking It


When you learn how to wash your wool sweater, you'll manage to do more than retain for decades this quintessential example of quiet luxury women’s clothing. Beyond longevity, a care regimen for wool also allows you to minimize your carbon footprint.


Why? Because wool does not need to be washed after every use. 


But just how often do you wash a wool sweater?


Just twice in every season on average. You consume less energy and water to clean it. 


When you wash it, the delicate and natural fibers require a low temperature. When you dry it, you just need to lay it flat on a surface. That you don’t have to wash your wool sweater as often as you thought may help you worry less about shrinking the garment.

 

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Why Wool Shrinks


The culprits to shrinking wool are heat and movement. 


As a protein fiber, wool has a unique scale structure. It’s elastic and naturally crimped, so the fibers interlock and retain their shape. Through heat and movement, the scales swell and catch each other, binding the fibers closer and closer together until the garment shrinks.


When you spin dry wool sweaters, the vigorous action in the machine felts the wool. Felting shrinks the fabric and changes its texture, transforming it into a fuzzy, thick fabric. Once that happens, you can’t restore the wool sweater’s original size.


The best way to wash wool sweaters is to do it gently and to air dry the garment.

 

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How to Wash Wool Sweaters at Home


Wool care is not only gentler on the environment, it’s also easier than you think. Handwashing is the best option since it’s quick and more affordable than dry cleaning.


Here’s how to clean your wool sweater by hand.


Step 1: Use a big basin or a large sink and fill it with cool water.


The basin or sink has to be big enough to soak your wool sweater. 


Mix a cleanser that’s specifically formulated for wool, one that’s enzyme- and bleach-free. Alternatively, use baby shampoo, which should be mild enough to use on your wool sweater.


Step 2: Soak the sweater.


Dunk your sweater in the cool water mix, and let it soak for up to 30 minutes. 


You can also swirl it a bit in the water before leaving the garment. A key thing to remember when you hand wash wool is to never rub the fabric.


Step 3: Rinse by running cool water through the wool sweater.


After 30 minutes, drain the soaking water and run cool water through the sweater until it’s no longer soapy.


Step 4: Do not wring your sweater.


Press the water out of the sweater gently with your hands.

 

How to machine wash your wool sweater.


If you want to use a machine to wash your wool sweater, here’s how:


Step 1: Place your wool sweaters in a mesh bag.


Turn your wool sweaters inside out before placing them inside the mesh bag. The bag adds a layer of protection for the natural fibers of wool. 


Similar to the soap used in handwashing, use wool-formulated soap. Avoid using fabric softeners because they will affect the natural fibers of wool.


Step 2: Choose the delicate setting on your machine.


Press the gentle cycle on your washing machine; some machines might have “hand wash” or “wool cycle.” Make sure the water is cold and the spin is set to low.


Step 3: Take out the wool sweaters immediately after.


Once the cycle is done, remove the mesh bag. Immediate removal prevents creasing, so you’ll want to stick around the machine before it stops. 


Step 4: Gently squeeze out the water.


Make sure your wool sweater isn’t dripping with water. Squeeze out moisture by gently pressing each sweater with your hand.

 

Here’s how to dry your wool sweaters.


Air drying is the only way to dry wool. Even though some wool care instructions may allow a gentle dry cycle,  the low-heat level from your dryer will cause felting and piling, which will shrink the garment.


How do you air dry a wool sweater?

  • Lay it out onto a drying rack. If you don’t have one, a clean towel will do.
  • Work the sweater into its original shape.
  • Using your hands, gently press away any creases. This smoothing process will prevent wrinkles from forming.
  • Squeeze out excess moisture from the sweater by rolling it up in the towel.
  • Get another clean towel and lay out your wool sweater on it to continue drying it in a well-ventilated area.


Never hang or yank at your wool sweaters. Doing either will warp the shape of your sweater.

 

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Taking Your Wool Sweater to Professionals


Before taking your wool garments to a service provider, make sure they can be machine washed. Check the labels of your sweaters. See which ones are strictly for hand washing and which ones can be machine washed.


If your wool sweaters come in a variety of colors (always get the best women’s luxury tops in different colors), use separate bags for colored pieces and whites.  


Although cleaners know and practice the nuances of washing wool garments, it’s safer to group your garments accordingly.

 

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How to Take Care of Your Wool Sweater


Wool garments can be washed twice every season, or depending on how often you use them. If you wear wool sweaters more than a few times, make sure they’re clean before putting them away. 


We recommend the following steps before storing your garment.


De-pile

  • The more you wear a wool garment, the more piling occurs because of friction. Piling appears as little balls on your wool sweaters. You can get rid of them by using a sweater comb, for thinner weaves, or a sweater stone (usually made of pumice), for thicker sweaters.
  • Move the comb or stone in the direction of the weave, never against it. Use gentle motions as you move the tool across the sweater.
  • De-pile along the inseams, shoulders, underarms, and wherever friction mostly occurs.

Spot Clean

  • When you spot a stain, handle it with care. Simply drop a wool formulated detergent on the spot. Follow it up with a few drops of cool water, then create a lather.
  • Gently work at the stain by massaging it. Remove the excess soap with a wet cotton ball. Repeat the process until you’re satisfied with cleaning.
  • Lay the garment flat to dry.


To store your wool sweaters, fold them carefully. Place them in zippered cotton or linen bags because breathable fabrics protect your delicate garments from moisture and bugs. 


Wool is vulnerable to insects, so plastic and cardboard boxes are not suitable since these containers attract bugs. An extra step that can keep bugs away is steaming your wool garments.

 

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Shop for Wool Sweaters


Natural fabrics like wool present opportunities to minimize your carbon footprint while allowing you to care for your garments. Whether you prefer alpaca to cashmere, wool is a perfect addition to your wardrobe.


From versatile basics like black turtlenecks to modern and roomy crewnecks, Rue Sophie’s collection features pieces you’ll want to procure. 


Shop for wool sweaters at Rue Sophie today.

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