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30,000+ Sweaters Sold
6 Reasons America Is Ditching Polyester For Seaweed
Softer than polyester. 3x more breathable. Zero microplastics per wash. Made from regeneratively farmed Icelandic seaweed. Meet SeaCell. The best kept secret in natural fiber.
Try SeaCell Risk-Free
30-Day Money Back Guarantee
30-Day Money Back Guarantee
Lifetime Repair Guarantee
Lifetime Repair Guarantee
Proudly Knit In Brooklyn, New York
Proudly Knit In Brooklyn, NY
How Does SeaCell Stack Up?
Breathability
Softness
Moisture Control
Moisture
Control
Odor Control
Odor
Control
Microplastics
Oliver Charles
SeaCell
3x more
breathable
Unbelievably
soft
Wicks
30x better
Stays
fresh
Zero
per wash
Polyester
Sweaters
Traps
heat
Feels like
plastic
Stays
clammy
Smells in
hours
7,000+
per wash
Polyester pollutes and underperforms. Our SeaCell is better across the board.
1. Most Clothes Are Made From Plastic. Seaweed Changes That.
60% of all clothing is made from plastic yarns like polyester. Every time you wash them, they shed 7,000+ microplastic fibers that end up in the ocean and in your food. Most people have never thought of their wardrobe as a plastic problem. Now you can't unthink it. Meet the seaweed alternative.
2. Made From Seaweed. Yes, Really.
The seaweed in SeaCell is regeneratively farmed in the clean, remote Icelandic fjords. Local farmers trim only the very tops of each plant once every four years. The beds grow back naturally every time, larger than before. No fresh water. No pesticides. No arable land. From there it is spun into a silky soft yarn using a closed-loop process that recycles 99% of everything used. A fiber that comes from nature and returns to it completely.
3. Cooling And Breathable On 85°F Days.
SeaCell is 3x more breathable than polyester and pulls sweat away from your skin 30x better. No more overheating an hour into wearing it. No more clamminess that makes you regret putting it on. Just a sweater that works with your body temperature on the days that are too nice to stay indoors.
4. The Missing Piece In Every Summer Wardrobe.
Too warm for a jacket. Too cool for just a t-shirt. There is a gap in every summer wardrobe and most people fill it with something that disappoints. Our SeaCell Sweater is built for exactly that gap. A layer against aggressive AC and a shield from the sun with a UPF 50+ rating. Lightweight enough to wear in July, polished enough for the office, and versatile enough to replace five pieces you already own.
5. The Sweater That Costs the Planet Less.
Polyester is made from petroleum. Every year the fashion industry consumes 350+ million barrels of oil to create polyester and releases 8+ million tons of plastic into the ocean. And every polyester sweater takes 200 years to break down. SeaCell offers the same durability and comfort, performs better on your skin, and leaves nothing behind except a seaweed bed that grows back larger than before.
6. The Bundle Hack.
Here is how it works. We give 25% off any order of three or more items. Add a SeaCell Sweater and two pairs of socks. The sweater does the heavy lifting. The socks end up being free. And you still walk away with money off the sweater. No code needed. Just add and save.
Summer Sale
Up to 25% Off. Limited Time.
You have been looking for a sweater like this. Now is the best time to get it.
Try SeaCell Risk Free
30-Day Money-Back Guarantee
Lifetime Repair Guarantee
Why Customers Choose Oliver Charles
Never Irritates, Never Digs In, Never Lets You Down.
Most sweaters have seams that dig in, rough fibers that irritate, and a synthetic feel that gets worse all day. Our SeaCell sweaters are different at a fiber level. SeaCell is naturally smooth and gentle, making it ideal for sensitive skin, synthetic textile allergies, and heightened tactile sensitivity. Our sweaters are completely seamless, so nothing touches your skin except soft, natural fabric. The sweater you reach for every morning without thinking.
Lasts a Lifetime, Guaranteed.
SeaCell fiber is already 2x stronger than cotton. Then we make it even stronger. Every Oliver Charles sweater is knit seamlessly in the USA using a Japanese technique refined over 100 years. One continuous piece of fabric means no seams, no failure points, no irritating ridges. Just a sweater that gets better with every wear. We back every sweater with a lifetime repair guarantee.
Risk Free With Our Money Back Guarantee
We are confident this will be the best sweater you have ever owned. If it is not, we will make it right. Every Oliver Charles sweater comes with a 30-day money-back guarantee and a lifetime repair policy. Free and easy returns and exchanges.
Over 30,000 Sweaters Sold. Travel-Tested in 40+ Countries.
Oliver Charles SeaCell Sweaters are at their lowest price of the year right now. Join thousands of travelers, minimalists, and natural fiber enthusiasts who decided one great sweater beats ten average ones.
Customer Reviews
4.8/5.0 (Based on 1,000+ reviews)
I was skeptical about the seaweed. Now I'm ordering a second
"Traditional wool always left me itchy and uncomfortable. After wearing this for the first time I was genuinely surprised. Incredibly soft, lightweight, and cool to the touch even on the hottest days. I'm buying another one in a different color."
Chris W. | Verified Customer
No seams make it a very smooth fit and feel
"I need clothes that are soft and move with me as a toddler mom. I was skeptical I could wear this seven days without a wash. The sweater held its shape, never smelled, and toddler gunk wiped off with a baby wipe. The lack of seams was a beautiful surprise for my sensory needs. Wearing the same thing every day was a relief, not a sacrifice."
Nickolette C. | Verified Customer
I never thought I'd wear a sweater through a Florida summer
"Florida is hot and humid in the summer months, but I am totally comfortable wearing my sweater made of seaweed. Cool and cooling even here in the tropics. I never thought I would find a summer sweater I could actually wear down here."
Marianne B. | Verified Customer
Now I own five of them
"I have often made the mistake of buying cheap clothes. I know in theory that I should buy better quality. This time was different. I bought one seaweed sweater because I was intrigued. It was great, so I bought two more. Then two more. Now I have five. I'm sold on buying higher quality clothing."
Lorraine W. | Verified Customer
Once you know about fast fashion, you can't unknow it
"Seeing mountains of discarded clothes and learning about microplastics made me rethink my choices. Then I watched an Oliver Charles video of their 3D-knitting machine. Minimal waste, no inventory, earth-friendly materials, knit in the US. I appreciate value, but even more than that I appreciate values. The sweater is everything they advertise. It makes me think about every other choice I can make to stop adding to the mess."
Terri G. | Verified Customer
Frequently Asked Questions
What's SeaCell feel like?
Silky, soft, and lightweight against your skin. Where wool has natural texture and polyester can feel plasticky and irritating, SeaCell fibers are exceptionally smooth and gentle, making them ideal for sensitive skin, synthetic textile allergies, or heightened tactile sensitivity. Our seamless construction takes it further with zero seams and zero irritating ridges. Most customers describe it as the most comfortable sweater they have ever owned.
How do I wash it?
Oliver Charles SeaCell Sweaters are machine washable and machine dryable. We recommend reviewing the care label to make sure your sweater lasts forever.
How are they seamless?
Each sweater is knit as one seamless piece of fabric using a Japanese technique refined over 100 years. No seams, no waste, no failure points. And the seamless 3D construction means zero seam irritation. Customers with sensory issues say it's the first sweater they can wear all day.
Really? Seaweed?
Yes. The seaweed used is called Ascophyllum Nodosum, harvested from the clean fjords of Iceland once every four years.
Is SeaCell sustainable?
SeaCell has earned over 16 environmental certifications including OEKO-Tex Standard 100, Forest Stewardship Council, USDA Biobased, and Vincotte Composting. It is 100% biodegradable, regeneratively farmed, and produced without toxic chemicals. The seaweed beds it comes from have grown healthier every year since harvesting began.
Can I wear this at 85°F?
Yes. SeaCell is 3x more breathable than polyester and pulls moisture away from your skin 30x better. It shields against the sun with a UPF 50+ rating and layers perfectly against aggressive AC. Customers in Florida, Southern California, and Houston have worn it comfortably through summer. It is lightweight enough to wear in July and breathable enough to keep you comfortable all day.
Return and repair policy?
30-day money-back guarantee and a lifetime repair policy. We offer free returns and exchanges. If your Oliver Charles sweater ever needs attention, we will fix it.
30,000+ Sweaters Sold
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