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What Is Microfleece?

Niki Acker
Updated May 21, 2024
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Microfleece, also called polar fleece or simply fleece, is a soft, napped, synthetic wool material often made from polyester. It was first manufactured in 1979 by Malden Mills, now called Polartec LLC, but the company did not patent the product, with the result that there are now many different makers of polar fleece. Fleece is warm like wool and similar in appearance, but it is much softer, lighter, and easier to wash.

Any product that can be made from wool can also be made with microfleece. It is used in jackets, hats, sweat pants, blankets, and many other products. Microfleece comes in four different thicknesses: micro is the thinnest and most flexible, followed by 100, 200, and 300. Microfleece is also a great alternative for people who are allergic to wool, or those with sensitive skin.

Microfleece is also hydrophobic, or water-repellent, making it quick to dry and warm even when wet. When fully soaked, microfleece holds only one percent of its weight in water and remains breathable. Its hydrophobic properties make it good for wicking away sweat, so fleece is a great material for active wear.

Fleece has a few disadvantages as well. Depending on its quality, microfleece is not always durable. It can be especially susceptible to pilling and tears. Fleece also generates a lot of static electricity, making it a magnet for hairs and dust. It is also not always windproof, though denser forms of fleece and fleece products with windproof linings are available.

In addition, though fleece is easy to machine-wash, it can be damaged by improper care. If washed in hot water, tumble dried, or ironed, polar fleece can be ruined. A cool iron can be used if necessary. Polar fleece is also one of the most flammable clothing materials, especially compared to natural fibers like wool. Many fleece products are treated with a fire retardant to compensate for this.

Some believe that microfleece is more environmentally friendly than wool because it is often made from recycled plastic bottles, and is a vegan alternative to wool. However, research shows that microfleece may not be as environmentally friendly as initially thought. These studies indicate that every wash of microfleece clothing releases synthetic microfibers smaller than one millimeter into wastewater, which eventually finds its way into the environment, and inevitably into human food sources. Experts are currently studying to learn the effects of synthetic microfibers in the environment, and also ways that the shedding of these during a wash could be avoided.

BeautyAnswered is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Niki Acker
By Niki Acker , Writer
"In addition to her role as a BeautyAnswered editor, Niki Foster is passionate about educating herself on a wide range of interesting and unusual topics to gather ideas for her own articles. A graduate of UCLA with a double major in Linguistics and Anthropology, Niki's diverse academic background and curiosity make her well-suited to create engaging content for WiseGeekreaders. "

Discussion Comments

By anon997687 — On Feb 13, 2017

There has been a lot of news out lately about the water contamination concerns associated with microfleece. It is estimated to be an even greater contributor of plastic to our waterways than microbeads (which I'm sure many of you folks have heard about).

There is some good news though. NPR recently published an article (Feb. 2017) called "Are We Eating Our Fleece Jackets?" and from the article it seems that there is a special lint filter that folks can use in order to prevent the microfibers from entering waterways. Otherwise you might want to just use a non-synthetic fiber such as wool.

By anon299923 — On Oct 27, 2012

"It is also not always windproof" is not correct. Fleece is never windproof. A manufacturer of fleece clothing may add some windproof lining to make the garment windproof, but fleece itself is not a windproof material.

"Fleece also generates a lot of static electricity". Which I call a plus! In winter time, when the air is dry, it's fun to take off your fleece sweater over your head in a dark room. If properly charged you can actually see a huge amount of tiny little sparks in the material if you look up as you pull the sweater over your head. Call it infantile, but I like that.

By BambooForest — On Dec 09, 2010

@Denha, I agree. similarly, microfleece jackets are a great middle layer for slightly cold days, or even to wear under a heavier coat on very cold days.

By Denha — On Dec 08, 2010

I really like light microfleece, especially for blankets. It adds warmth without adding too much bulk, and is good on in-between days, when it's not too cold for a big comforter but not warm enough to not have any sort of blanket.

By anon129847 — On Nov 25, 2010

I love sewing with micro fleece myself. I got this amazing animal print from Yourfleece at a really great price. I love the blanket I made for my grandson!

Niki Acker

Niki Acker


"In addition to her role as a BeautyAnswered editor, Niki Foster is passionate about educating herself on a wide range...
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