Fleece sweaters are everywhere. They’re cozy, light, & usually pretty inexpensive. Marketing during this time of year makes them sound like a must-have for winter. But have you ever wondered what fleece is really made of? I know I have. I always check fabric labels, and fleece is one thing I’ve decided to skip. Here’s why:
What Is Fleece, Really?
Fleece originally came from the soft wool of a sheep. These days, when you see “fleece” on a tag, it usually means polyester fleece, a synthetic fabric.
Back in the late 1900s, brands made polyester fleece popular because it was cheaper and lighter than wool. It was easy to make, dried fast, and felt soft right away. Polyester fleece became the go-to for fast fashion & outdoor apparel.
But the problem is…polyester is a plastic textile that relies heavily on petroleum. And plastic sticks around forever.
Why I Choose Not to Wear Polyester Fleece
The biggest problem I have with synthetic fleece isn’t just how it’s made, it’s what it sheds.
Every time you wear or wash polyester fleece, it lets off microplastics, which are extremely tiny plastic fibers. These fibers end up in rivers, oceans, soil, and even in our food & water. Unlike natural fibers, microplastics don’t break down. They just pile up.
Besides the environmental aspect, a lot of people also find synthetic fleece:
- less breathable than natural fibers
- prone to holding onto smells
- staticky
For me, fleece is part of a bigger problem in fashion: making clothes for convenience, not for lasting quality, our health, or the planet’s.
Is All Fleece Plastic?
Not always, but most fleece you see in stores is plastic.
Fleece can be made from natural fibers, but that’s pretty rare. If you want to shop smarter, it helps to know the difference between:
- Polyester fleece (plastic, most common)
- Wool fleece or wool pile (natural, insulating, breathable)
- Cotton fleece (often used in sweatshirts & pullovers)
Brands don’t always make this obvious, so it’s smart to check the fabric label. I have a post on what to look for in natural, sustainable clothing here.
Better Alternatives to Polyester Fleece
If you love how fleece feels but want to skip the plastic, here are some better choices:
Wool Fleece & Wool Pile
Wool keeps you warm, even if it gets wet, & it won’t shed microplastics. Of course, wool doesn’t come without its own issues, and if you are vegan, you would avoid it entirely. Try these:
- Merino wool fleece
- Boiled wool
- Wool pile or sherpa-style wool
Cotton Fleece
Cotton fleece (the kind you find in most sweatshirts) is soft and plastic-free. Look for:
- 100% cotton fleece
- Organic cotton, when possible
- Brushed or loopback interiors
Layering With Natural Fibers
Instead of wearing one big fleece, try layering with:
- Wool sweaters
- Cotton thermals
- Wool cardigans or pullovers
These options keep you warm, let your skin breathe, & are better for the planet.
What About Secondhand Fleece?
I’m cautious about polyester fleece, but I’m not totally against it if it already exists. Honestly, the most eco-friendly thing you can wear is usually what’s already in your closet, especially if the other option is tossing it in the trash.
If you love how fleece feels or need it for layering or outdoor apparel, buying it secondhand is a smarter move. You’re not creating demand for new plastic clothes & you’re keeping old ones in use longer, which ultimately helps cut down on waste.
But even secondhand fleece still sheds microplastics, so how you wash & care for it matters.
If you do go for secondhand fleece, here’s what I suggest:
- Wash it as little as possible (just spot clean if you can),
- use cold water and a gentle cycle,
- skip the dryer when you can,
- and use a laundry bag or filter (like a Guppyfriend) to catch microplastics before they get into the water.
This isn’t a perfect solution, but it’s a practical way to do less harm, especially since plastic fabrics are everywhere these days.
3 Plastic-Free Fleece Sweaters
If you still want that fleece feeling without the polyester, there are a few natural options out there. These picks are warm & soft, but don’t rely on plastic:
- Organic Fleece Quarter Zip Sweatshirt from MATE the Label
This one’s made from organic cotton fleece, so it feels cozy and like your favorite sweatshirt. It’s a solid everyday swap for regular fleece. - Merino Wool Fleece Unisex Hoodie from Driftless Goods
Merino wool keeps you warm, lets your skin breathe, & helps you stay comfortable in any weather. This hoodie is a great choice if you want warmth with zero plastic. - Oversized Wool Fleece Jacket made from pure organic merino wool from Hessnatur
This jacket is made from pure organic merino wool, so it’s real wool fleece. It’s perfect if you want a bold, all-natural outer layer.
Lower-Impact Options (Still Some Synthetics)
Some brands make fleece alternatives that are mostly wool, but have a little synthetic material to make them tougher or help them hold their shape. They’re not totally plastic-free, but they’re better for the planet than regular polyester fleece—especially if you take good care of them:
- Women’s All Season Wool Fleece Pullover from L.L.Bean
- Women’s Elowen Fleece Cardigan from Finisterre
If you pick one of these, take care of it the same way: wash it only when you need to, use cold water, and always use a Guppyfriend bag or another filter to catch microplastics.
My Final Thoughts on Plastic Fleece Sweaters
Fleece sweaters are cozy, but it’s good to know what they’re made of. Polyester fleece is super common now, but that doesn’t make it the best choice. Picking wool or cotton instead is an easy way to cut down on microplastics & build a wardrobe with real, natural materials.
As always, it’s not about being perfect; it’s about knowing your options. Read labels, ask questions, and pick something better when you can.
p.s. If you already own a fleece sweater, don’t get rid of it. My tip would be to wash seldom and use a guppy bag to avoid microplastics entering our waterways while washing.
