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Looking for sustainable sweaters that keep you warm without harming the planet?
We’ve rounded up the best eco-friendly knitwear for fall and winter—made from organic cotton, responsible wool, and vegan sweater alternatives you’ll want to wear on repeat.
These ethical sweaters deliver comfort, durability, and style in one cozy package.
From chunky pullovers to sleek layering pieces, each one is crafted with natural or recycled fibers and made to last season after season.
👉 Also shopping for scarves? Check out our sustainable scarf guide!
If you’re reading this, you probably already know that most sweaters you find at big-box stores are made with cheap synthetic fabrics, which are essentially plastic spun from petroleum.
They may look cozy at first, but they lose shape quickly, shed microplastics with every wash, and take centuries to break down in landfills.
And then there are the toxic dyes and PFAS‑based finishes that can linger in fabric or wash out in production waste, polluting waterways and putting your health at risk.
For something so seemingly innocent, these fast fashion sweaters can come with a hefty environmental cost.
But there’s good news!
More and more, brands are now making sustainable sweaters with safety-certified, regenerative, and PFAS-free fibers that are good for you, the planet, and the people who make them.
So if you’re ready to build a conscious wardrobe that feels as good as it looks, we’ve researched, tested, and lived in the 11 best sustainable sweaters for fall and winter.
What are the best materials for eco-friendly sweaters?
When it comes to your sweaters, material matters. Not only does it determine how warm your sweater will be, but also how to care for it and how long it will last.
The Best Natural Materials for Sustainable Sweaters
💡 Go Natural First! Skip plastic-heavy synthetics when possible and opt for 100% natural fibers like wool, organic cotton, or hemp.
- GOTS Organic Cotton – fewer pesticides, ultra-soft, easy care.
- Merino Wool – regulating, breathable, great for layering.
- Alpaca Wool – toasty without bulk, low lanolin (less itchy).
- Hemp – strong, breathable, and durable in blends.
Are Bamboo, Recycled Materials & Fabric Blends Really Safe?
Bamboo: While bamboo is often marketed as a sustainable fabric, most “bamboo” clothing is actually bamboo viscose—a chemically processed rayon made with harsh solvents. For a safer, more sustainable option, look for closed-loop bamboo production or alternatives like TENCEL™ lyocell, which use cleaner methods and retain plant-based integrity.
👉 Want the full scoop? Read our in-depth guide to Bamboo Clothing and Fabric Safety.
Recycled Materials: Natural recycled fibers like recycled wool or recycled cashmere are excellent low-impact choices—they conserve resources and reduce textile waste. Recycled synthetics (like polyester made from plastic bottles) help divert plastic from landfills, but they can still shed microplastics during wear and washing.
👉 Learn more about the hidden risks in our guide to Microplastic Shedding From Clothes.
Fabric Blends: If you’re buying a blended fabric, aim for one with at least 75% natural fibers. These blends breathe better, last longer, and feel more comfortable. Look for third-party certifications like GOTS, RWS, Fair Trade, or OEKO-TEX® to confirm safety and sustainability.
💡 TIP: When in doubt, prioritize simplicity—single-fiber fabrics are often safer, easier to recycle, and less likely to contain hidden chemical treatments.
Beware of PFAS and Toxic Dyes in Conventional Sweaters
Most of us associate PFAS (per‑ and polyfluoroalkyl substances) with nonstick pans or rain jackets, not cozy knitwear.
But these “forever chemicals” are surprisingly common in everyday clothing—including sweaters.
After the fabric is knit and dyed, many brands apply chemical “finishing treatments” that can:
- Repel stains or odors
- Prevent wrinkles or shrinkage
- Lock in bright color or softness
But here’s the catch: many of these textile finishes rely on PFAS, formaldehyde-based resins, or toxic dyes.
These chemicals don’t wash away easily—they can persist through dozens of cycles, leach into waterways, and even absorb through your skin.
🔗 Want a deeper dive into PFAS in fashion? Check out this detailed guide on Toxic Free Choice (TFC), our science-backed sister site focused on ingredient safety, regulatory loopholes, and how to identify truly non-toxic textiles.
Why trust TFC?
Toxic Free Choice is our research-first, no-fluff resource for uncovering what’s really inside the products we use.Every article is grounded in toxicology reports, lab studies, and global chemical safety databases—so you can make the most informed decisions for your health and home.
PFAS have been linked to hormone disruption, immune system harm, and increased cancer risk—even at extremely low levels of exposure. That’s a steep cost for wrinkle resistance.
But here’s the good news: you have better options.
We dug through fiber content, certifications, and manufacturing policies to find these 11 sustainable sweaters made with natural and recycled materials and fewer unwanted toxic finishes.
Many of these brands lean on OEKO‑TEX, GOTS, bluesign approved processes, or clear “no PFAS added” standards.
Sustainable Sweater Brands We Can Trust
The Quince Cotton Boyfriend Crew is one of the best budget-friendly organic cotton sweaters for fall layering.
Made from 100% OEKO-TEX certified cotton, it’s soft, breathable, and built to last with a relaxed fit, ribbed neckline, and cuffs that hold their shape.
Garment-washed for instant comfort, it comes in earthy tones perfect for capsule wardrobes.
Quince’s direct-to-consumer model cuts waste and cost, offering high-quality, eco-friendly knitwear at a refreshingly honest price.
size & Price range
XS–XL | $39.90
materials
100% OEKO-TEX Certified Cotton
location/shipping
United States | Ships To Canada
+ More Sustainable Sweaters From Quince:
Use discount code SUSTAINABLYKINDLIVING to save 10%!
The Fair Indigo Relaxed V-Neck Sweater is a timeless ethical cotton sweater for transitional weather.
Crafted from pesticide-free cotton in a family-run workshop in Peru, it combines a flattering drape with a medium-weight knit for versatile layering.
Small-batch production, pre-washed fabric to reduce shrinkage, and a classic design make this one a sustainable sweater you’ll wear for years.
Size & Price Range
XS–XL | $89.90
materials
100% Naturally Sourced Cotton
Location/Shipping
United States, ships to Canada
The beloved Son de Flor Crop Wool Sweater is back this season in stunning new colors—and it’s just as cozy and elegant as ever.
Made from 100% certified wool, this waist-length sweater features a loose, relaxed fit with long sleeves, a classic crew neckline, and a beautifully unique button-down back.
It’s soft to the touch, breathable, and designed to last for seasons to come.
Whether layered over dresses or paired with high-waisted bottoms, this timeless piece brings effortless charm to any cold-weather wardrobe.
Gentle care instructions help preserve its shape and texture, making it as practical as it is stylish.
size & Price Range
XXS-5XL | $165
materials
100% Wool
Location/Shipping
Lithuania, ships worldwide
The Sienna Oversized V-Neck Sweater from Reformation combines vintage collegiate style with modern sustainability.
Made from 100% natural cotton, this chunky eco-friendly sweater features drop shoulders, exaggerated cuffs, and a slouchy fit perfect for layering over dresses or pairing with high‑waisted jeans.
Breathable and seasonless, it transitions easily from fall to spring, making it a year‑round staple.
True to Reformation’s ethos, it’s crafted with lower‑impact fabrics and designed to be worn for years, not just one season.
size & Price Range
XS–XL | $198
materials
Cotton | Deadstock Fabrics | TENCEL™ Lyocell | Refibra | Alpaca Wool
Location/Shipping
United States
Outerknown merges surfside ease with thoughtful ethics, and the Nostalgic Sweater perfectly combines both.
Co-founded by Kelly Slater, the brand champions Fair Labor Association–accredited factories, Certified B Corp standards, and plastic-free shipping.
Their use of 70% natural cotton and 30% recycled cashmere reduces waste while offering the luxurious feel of heritage fibers.
What sets Outerknown apart is their focus on quieter sustainability initiatives like creating low-impact fall wardrobe essentials with space-dye techniques and small-batch production to minimize water and color waste.
size & Price Range
XS–XL | $198
materials
Regenerative Cotton | Hemp | Recycled Nylon | Responsible Wool
Location/Shipping
United States, ships to the United Kingdom, France, Hong Kong & Australia
Jenni Kayne isn’t just about coastal cool; this women-owned brand is redefining slow fashion knitwear with a timeless, sustainability-first mindset.
From partnering with ethical factories to embracing natural fiber sweaters and long-lasting design, they believe in thoughtful wardrobes that never go out of style.
They steer clear of fleeting trends and instead focus on neutral palettes, high-quality materials, and intentional craftsmanship that reduces waste.
The Simone V-Neck is a great example. It’s made from 100% natural cotton and designed to become a go-to staple, not closet clutter.
size & Price Range
XS–3XL | $225
materials
Cashmere | Wool | Alpaca | Cotton | Linen
Location/Shipping
United States, ships to Canada, the United Kingdom, Spain & Switzerland
Colorful Standard proves that basics don’t have to be boring or wasteful.
Their Oversized Crewneck is made from 100% pesticide-free cotton, garment-dyed using environmentally friendly, PFAS-free dyes for rich color without harmful chemicals.
The brand manufactures everything in Portugal at a zero-waste, renewable energy-powered facility where workers are paid fair wages and treated with respect.
From seed to seam, this piece skips the pesticides, plastic, and greenwashing—and offers one of the best vegan wool alternatives for cool-weather layering.
Colorful Standard also ships in recycled packaging and offsets emissions with carbon-neutral delivery options!
size & Price Range
XS–3XL | $225
materials
Cashmere | Wool | Alpaca | Cotton | Linen
Location/Shipping
United States, ships to Canada, the United Kingdom, Spain & Switzerland
The Mate The Label Lightweight Terry Raglan is a seasonless organic cotton sweater made from 100% GOTS-certified organic cotton.
Free from PFAS, formaldehyde, and BPA, it’s garment-dyed in small batches for rich, lived-in color.
Lightweight yet cozy, this ethical sweatshirt transitions from cool mornings to breezy evenings with ease—proof that comfort and sustainability can coexist beautifully.
size & Price Range
XS-XL | $128
materials
100% Organic Cotton French Terry
Location/Shipping
United States, ships internationally
The True Knit Sweater from Organic Basics is proof that minimalist design and sustainability can go hand in hand.
Crafted from 100% GOTS-certified organic cotton, it’s soft, breathable, and naturally free from harmful chemicals or synthetic fibers.
The boxy, slightly cropped cut with dropped shoulders gives it an effortless, modern drape that layers beautifully over dresses, trousers, or your favorite jeans.
Made without synthetic fertilizers, the organic cotton helps build healthier soil and reduce environmental impact.
Each sweater is produced with transparency—complete with a life cycle assessment that details its carbon footprint from raw material to your doorstep.
size & Price Range
XS–3XL | $68
materials
100% Organic Cotton
Location/Shipping
Denmark, ships worldwide
Use discount code SKL to save 20%!
The Allwear Crewneck Sweatshirt blurs the line between sweater and sweatshirt, offering a versatile vegan sweater alternative for year-round wear.
Made with 95% OEKO-TEX certified cotton and 5% elastane for comfort, it’s designed with circularity in mind—low-waste production, carbon-neutral shipping, and biodegradable construction.
The midweight French terry texture and classic crew cut make it ideal for layering over tees or pairing with jeans for an effortless, eco-conscious look.
Size & Price Range
XXS–7XL | $98
materials
95% OEKO-TEX Certified Cotton | 5% Elastane
Location/Shipping
United States
The LUCIE Batwing Sweater from L’Envers brings a dose of Parisian style to your fall wardrobe.
Knitted from mohair wool with a trace of polyamide for stretch, it’s crafted in small batches in Spain by artisan ateliers who prioritize quality over speed.
The batwing silhouette offers flattering volume through the arms and a slightly cropped fit at the waist — perfect for layering over dresses and trousers.
L’Envers skips fast fashion fluff in favor of heirloom craftsmanship and slow fashion principles: no plastic packaging, no wasteful overproduction, and timeless colors like ash grey and cinnamon brown.
size & Price Range
XS–XL | $317
materials
80% Mohair Wool | 20% Polyamide
Location/Shipping
France, ships to Germany & Switzerland
The Best Sustainable Sweaters for Fall Layering
Fall weather can change in an instant—cool mornings, warm afternoons, breezy evenings, and everything in between.
That’s why keeping a small stack of eco-friendly sweaters you can mix, match, and layer is a lifesaver this time of year.
Lightweight sustainable sweaters in fine-gauge cotton, breathable merino wool, or soft cashmere give you warmth without bulk. Try a slim cotton V-neck from Reformation or the relaxed crew from Quince under a denim jacket.
The bright cotton layers from Colorful Standard add a pop of color under trench coats without bunching—perfect for crisp fall strolls.
Sweaters vs. Sweatshirts: What’s Better for Fall?
Sweatshirts can be just as effective for fall layering. Allwear’s French terry top and Colorful Standard’s cotton crew neck sweatshirt function like sweaters when you want grab-and-go comfort.
Need something warmer? Check out our Sustainable Wool Sweaters Guide for those extra-chilly days.
Coziest Eco-Friendly Sweaters for Winter
For the coldest days, choose warmer knits like alpaca, merino wool, or recycled wool—they keep heat in while wicking moisture away.
Patagonia’s recycled wool picks and L’Envers’ mohair and wool knits are winter favorites.
For plush blends, Outerknown offers recycled cashmere and cotton mixes, while Jenni Kayne delivers timeless ethical wool and cashmere cuts for long-term wear.
How to Style Sustainable Sweaters All Season
A great sweater can be your hardest-working wardrobe piece—dressed up for the office, layered for hikes, or tossed over a dress for last-minute plans.
Style tips:
- Pair with sustainable joggers for cozy loungewear.
- Layer fine-gauge knits under coats or blazers for warmth without bulk.
- Pair a timeless V-neck with tailored trousers for work or over a slip dress for weekend ease.
- Wear over a tee for casual days, or elevate with a silk cami.
How to Care for Your Sweaters So They Last
- Wash less: Most wool, alpaca, and cashmere are naturally odor‑resistant — air them out between wears. Cotton and plant‑based knits can also go several wears before washing unless visibly dirty.
- Hand wash gently: Use cool water and a mild, enzyme‑free detergent. Swish, soak, and rinse without wringing to avoid stretching.
- Machine wash only if needed: Stick to a gentle cycle, cold water, and a mesh laundry bag to prevent snags. Avoid the dryer.
- Dry flat: Lay on a towel away from heat or direct sun to help knits keep their shape.
- Store folded: Prevents shoulder stretching. For long‑term storage, keep clean sweaters in breathable bins.
- Natural moth defense: Use cedar blocks or lavender sachets to protect wool without chemicals.
- Skip harsh chemicals: Enzyme-heavy detergents and fabric softeners can strip natural fibers. Try our favorite non-toxic laundry detergents!
- Fix pilling & snags: Use a sweater comb or depilling stone early to keep knits looking fresh.
Frequently Asked Questions
Sustainable sweaters often use natural fibers like organic cotton, merino wool, alpaca, hemp, or recycled fibers such as recycled wool and cashmere. Some also use TENCEL lyocell for softness and breathability.
Yes. Warmth depends on knit density, fiber loft, and layering. Wool, alpaca, and recycled wool are excellent for retaining heat while wicking away moisture.
Natural fibers come from plants or animals and are biodegradable. Recycled fibers are made from existing textiles or plastics, helping reduce waste, but may still shed microplastics if synthetic-based.
Some can. Look for certifications like GOTS, OEKO-TEX, or bluesign-approved dyes to avoid harmful chemicals such as PFAS or heavy metals.
Check for fiber percentages, certifications, manufacturing transparency, and repair programs. Avoid vague “eco-friendly” claims without proof.
Check for fiber percentages, certifications, manufacturing transparency, and repair programs. Avoid vague “eco-friendly” claims without proof.
Yes. Heavy cotton knits, hemp blends, and TENCEL lyocell can be cozy when layered properly, offering a wool-free option for cooler weather.
Wash less often, hand wash in cold water with mild detergent, and dry flat. Always fold rather than hang to maintain shape.
Budget-friendly options include Quince, Tentree, and Colorful Standard. You can also shop secondhand from Patagonia Worn Wear or other resale platforms for premium knits at lower prices.
Choose Layers That Last
The cooler seasons are the perfect time to invest in the best sustainable sweaters for cold weather.
And now you have a great sustainable sweater selection to choose from!
This isn’t about buying more. It’s about choosing better. For your health, for garment workers, and for a planet that doesn’t need another landfill-bound acrylic blend.
Whether you’re looking for an affordable staple or investing in a heritage piece, the goal is the same— building a wardrobe that you’re going to love (and will keep you warm) season after season.
Did you enjoy this list of sustainable sweaters? Check out more below!
- Vegan-Friendly Wool Alternatives
- Sustainable Men’s Clothing Brands
- Affordable Sustainable Fashion Brands
- Sustainable Mother’s Day Gift Ideas
- Plus-Size Clothing Brands
- Non-Toxic Leggings
- Sustainable Base Layers & Thermals
- Sustainable Beanies & Winter Hats
- Best Barefoot Fall & Winter Boot
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