Kent Organic Supima Cotton Underwear Review: French Cut & Thong

Last Updated on November 10, 2026 by Kasey Lynch

If you’re searching for an honest review of Kent underwear, you’re in the right place. I’ve tested over 35 pairs of natural fiber underwear and ranked every one on my 100-point scorecard, so you can compare brands side by side. See how Kent stacks up against the other styles I’ve ranked on my master scorecard. 

In this review, I’m covering two styles from Kent, the French cut and the thong, both made of 100% organic Supima cotton. I’ll walk you through the brand first, then each style, and there’s a bonus at the end of something I really love that I think you should know about. 

I sized up to a large in both underwear styles, and they fit like a glove. 

Table of Contents

Kent Underwear Review: Scorecard at a Glance

Category	Points possible	French cut	Thong
Gusset	25	25	22
Odor & breathability	20	18	18
Seams & movement	20	17	17
Fabric quality	20	19	19
Waistband	15	14	15
Total	100	93	91

That 93 is the highest score I’ve given any organic cotton underwear so far, and it ties the highest score I’ve given overall. The thong’s 91 is also a very strong result for 100% organic cotton.

About Kent: A Woman-Founded, Plant-Based Underwear Brand

Kent was founded by Stacey Grace, and sustainability sits at the heart of the brand. Based on the products I tested and what I found on their website, the company follows through on that commitment. Every detail of these garments has been carefully considered, and I truly appreciate that intentionality.

Here’s what that looks like in practice:

• 100% plant-based products: 100% organic Supima cotton, plus other plant-based fibers
• Bio-based elastic band
• Compostable at end of life
• Soy-based inks on the garments and the packaging
• OEKO-TEX certified trims and finishes
• Fair factory pay: they partner with a factory in India that pays workers 25% over the living wage for that region
• Free from petrochemicals, pesticides, BPAs and microplastics

I find that level of transparency really helpful. If you care about non-toxic, plastic-free underwear, this is the kind of detail you want to see.

What Is Supima Cotton, and Why Does It Matter for Underwear?

You might be wondering what the difference is between regular cotton and Supima cotton. It comes down to the fiber itself, and in underwear, the fiber is everything.

Supima is a premium, American-grown cotton known for its extra-long fibers. Regular cotton has shorter fibers, which means more loose ends sticking out of the yarn. Those ends are what tangle, fuzz up and form pills as the fabric is worn and washed. Longer fibers can be spun into a smoother, stronger yarn with fewer exposed ends, so underwear made from Supima doesn’t pill as fast.

That matters more for underwear than almost anything else in your closet. It sits against your skin all day, and it goes through the wash constantly. A fabric that stays smooth and holds up wash after wash is one you’ll keep reaching for.

Here’s why the rest of Kent’s fabric story matters too:

• Hypoallergenic: For anyone with sensitive skin, a gentle natural fiber worn this close to the body is a real plus.
• Naturally cooling: Cotton breathes, which helps keep you comfortable. The trade-off is moisture. Cotton holds onto it (its moisture regain is around 8 to 11%), so it stays damp longer in an intense, sweaty workout. That’s why I’d choose it for everyday wear and not for the gym.
• Organic: Kent’s cotton is certified organic, and the brand says its pieces are free from pesticides, petrochemicals and BPAs.
• Microplastic-free: Plenty of underwear is made with synthetic fabrics or elastics that contain plastics. Kent’s pieces are made from plant-based fibers with a bio-based elastic band, so there are no plastics here.

Kent French Cut Review: 93/100

I love a French cut. For full-coverage underwear, I think it’s my favorite, with that long-leg, 80s-vibes look that is inherently sexy. Kent’s Organic Cotton French Cut Underwear is $28 a pair, comes in sizes XS to 3XL (the same range as all of their underwear), and is made of 100% organic Supima cotton.

Sizing tip: I sized up and got a large, after checking their size guide, which I highly recommend you do too. It fit like a glove, so here’s how it scored:

• Gusset: 25/25. Great coverage from back to front at 5.5 inches long. The gusset is sewn in on both sides, the narrowest width is 2.75 inches (a 5/5 on its own), it has a double layer, and the placement is ideal. I have no issues here.
• Odor & breathability: 18/20. Most of the deduction is moisture feel: in a hot, intense, sweaty workout, cotton stays damp longer (its moisture regain is around 8 to 11%).
• Seams & movement: 17/20.
• Fabric quality: 19/20.
• Waistband: 14/15. The only reason I took a point off is that the seams are pretty substantial.

Final score: 93/100.

Kent Thong Review: 91/100

As someone with a lot of thong experience (I can’t handle a visible panty line in any way, shape or form), I went in picky. I sized up to a large here too, and it fit like a glove. Here’s the Organic Cotton Underwear Thong breakdown:

• Gusset: 22/25. At 5.75 inches long, it’s one of the longest gussets I’ve tested. Only Huha’s is longer, at 6 inches, and that one covers the whole underside. The narrowest width is about an inch, which is fine, but I wish the gusset were a little wider before it starts narrowing. It’s sewn in at the top and the bottom, which I love to see.
• Odor & breathability: 18/20.
• Seams & movement: 17/20. This is not an invisible thong. It’s great under jeans and pants, but not leggings, because the seam is fairly fat. Invisible, she is not, but comfortable, she definitely is.
• Fabric quality: 19/20. A very comfortable fabric.
• Waistband: 15/15.

Final score: 91/100. That’s a very well-done score for Kent, especially for 100% organic cotton.

Who Should Buy Kent (and Who Should Skip It)

I’ll be honest: I didn’t have big expectations going in, because I’ve had some hit-or-miss experiences with 100% organic cotton. But I’ve had these for a couple of weeks now, and I keep searching for them in my ever-growing underwear drawer. Here’s who I’d recommend them to:

• Buy if you want organic, plastic-free underwear with a great gusset and a comfortable, long-wearing fabric.
• Buy the French cut if you want full coverage with the best score of the two. Note this style does have some visible panty lines. 
• Choose the thong for jeans and pants. Skip it under leggings.
• Skip for workouts. I don’t recommend 100% organic cotton underwear for intense, sweaty workouts because cotton stays damp longer. Find quality swaps here

Bonus: Kent’s Sleep Set

If you like sleeping in a big t-shirt and smaller shorts, look at Kent’s sleep set. I wore it one night, washed it, and wore it again right away. It’s easily become my favorite pair of pajamas. The seams are done really nicely, the top has a boat neck, and it’s extremely comfortable.

Kent Underwear FAQ

Is Kent underwear really 100% organic cotton? 

Yes, Kent underwear is made from 100% GOTS-certified organic Supima cotton. The brand uses entirely plant-based materials, including a bio-based elastic band made from plant materials instead of synthetic elastics. Every garment is free from petrochemicals, synthetic microplastics, pesticides, and BPAs. Furthermore, Kent uses soy-based inks for printing on both the fabric and packaging, ensuring the finished underwear is completely plastic-free, non-toxic, and fully compostable at the end of its life.

What is Supima cotton? 

Supima cotton is a premium, extra-long staple cotton grown exclusively in the United States. Because its staple fibers are significantly longer than standard cotton fibers, yarn spun from Supima is smoother, stronger, and more resilient. Standard cotton uses shorter fibers with exposed ends that tangle and form pills over time. Extra-long Supima fibers produce a smooth weave that resists pilling, retains softness, and withstands repeated laundering, making it an ideal natural fabric for long-wearing daily underwear.

Is Kent underwear microplastic-free? 

Yes, Kent organic cotton underwear is completely microplastic-free. Most conventional underwear brands utilize synthetic fabrics like nylon and polyester or petroleum-derived elastane for stretch. Kent eliminates synthetic materials by combining 100% organic Supima cotton with a plant-based, bio-based elastic waistband. Additionally, the brand utilizes OEKO-TEX certified trims and finishes alongside soy-based inks. This construction prevents synthetic microplastic shedding during washing and wear, making the garments non-toxic, hypoallergenic, and safe for sensitive skin.

How much does Kent underwear cost? 

Kent underwear styles, including the French cut and thong, retail for $28 per pair. This price point reflects premium materials such as 100% organic Supima cotton, bio-based elastics, and ethical manufacturing practices. Kent partners with a certified factory in India that pays workers 25% above the regional living wage. While natural fiber underwear requires a higher initial investment than conventional synthetic options, the durable extra-long staple Supima cotton fibers prolong garment lifespan across repeated washes.

What size should I order? 

Kent underwear runs true to size based on the brand’s official measurement chart, with available sizes ranging from XS to 3XL. Because 100% organic Supima cotton lacks synthetic elastane or spandex, the fabric offers gentle natural stretch rather than heavy compression. Customers between sizes or preferring a relaxed, non-constricting fit should consider sizing up. Reviewing waist and hip measurements on Kent’s size guide prior to purchase ensures an accurate, comfortable fit across both French cut and thong styles.

Is Kent underwear good for workouts? 

Kent underwear is optimized for daily wear rather than high-intensity workouts. 100% organic cotton possesses high natural breathability, but its moisture regain rate is between 8% and 11%, meaning it absorbs and holds moisture during heavy sweating. For low-impact movement or daily activities, organic Supima cotton offers excellent temperature regulation and comfort. However, for intense exercise or heavy sweat sessions, synthetic or moisture-wicking technical fabrics are recommended to prevent dampness against the skin.

Will the thong show under leggings? 

Yes, the Kent thong may produce visible panty lines under tight athletic leggings. Because the brand uses durable plant-based fabric stitching and a bio-based elastic waistband instead of laser-cut or raw-edge synthetic bonding, the edges and seams are slightly thicker than seamless synthetic thongs. The Kent thong lays flat and comfortable beneath denim, trousers, and structured bottoms, but it is not designed as a completely invisible seamless option for tight activewear.

Is Kent underwear compostable? 

Yes, it’s 100% compostable at the end of its life cycle. Because the garments are constructed entirely from organic Supima cotton, plant-based bio-elastics, OEKO-TEX certified cotton threads, and non-toxic soy inks, they contain zero synthetic materials or plastics. Once worn out, the underwear can be placed into industrial or home compost systems, where it naturally breaks down into organic soil without leaving synthetic microplastic residue or toxic chemicals behind.