Free shipping across the US
1–3 business days
Easy free returns
30-day fit guarantee
Skip to product information
95% TENCEL™ Modal · Designed in the Nordics
The Boxer Brief
Launching in —
Black boxer briefs. Done properly.
95% TENCEL™ Modal. A proper 3D pouch. Soft waistband. No tags. No unnecessary details.
We spent 18 months trying to make the pair we actually wanted to wear every day. This is it.
Get 20% off KLOON. For life.
We’re giving the first 500 people who join before launch a personal 20% discount. Not just your first order. Every order. For life.
Claim my 20% for lifeNo payment. No order. Just your personal discount when we launch.
Free US shipping
30-day fit guarantee
Fabric & care
95% TENCEL™ Modal fibers, 5% elastane, in a lightweight 170 g/m² jersey. Machine wash on 40°C (104°F) with like colors on a gentle cycle, and skip the dryer.
Fit & sizing
KLOON is true to size, but runs larger through the body and legs than most underwear on the market. Many men size up a notch for room around the groin: with KLOON’s 3D pouch, that’s not necessary. The fit also holds up wash after wash, unlike a lot of traditional underwear that loses its shape. For an average build, M is usually enough room. For reference: at 186 cm (6′1″) and a 92 cm (36″) waist, I’ve worn L my whole life, with KLOON, I wear M.
Shipping & returns
Free shipping across the US. 1–3 business days, straight to your mailbox. 30-day fit guarantee: full refund, even after wear and washing.
The philosophy
Why only one boxer?
Because we’d rather improve one thing than launch ten average ones. KLOON started with a simple question: what would a boxer brief look like if we stopped treating underwear like a fashion collection and started treating it like a product worth perfecting? One style. One color. One fit, refined for eighteen months and counting.
The fabric
Ridiculously soft. In a very normal way.
KLOON is made from 95% TENCEL™ Modal and 5% elastane, knitted into a lightweight 170 g/m² jersey. It feels noticeably softer than traditional cotton underwear, handles moisture well and has enough stretch to move naturally with you. But the important part is simpler: you put them on in the morning and mostly forget about them. Which is exactly what good underwear should do.
One pair. Six things we cared about.
Nothing decorative. Every choice in this pair exists because it changes how the day feels.
Ultra-soft TENCEL™ Modal
Soft waistband
3D support pouch
Stay-put legs
Tag-free
Wash-tested ×20
KLOON, next to an ordinary pair
| KLOON | Ordinary boxers | |
|---|---|---|
| Softness | Still soft after several washes | Fades and roughens |
| All-day fit | Stays in place | Ride up. Get adjusted. |
| Seams & labels | Flat seams, tag-free | Scratchy tag, bulky seams |
| Moisture | Naturally dry feel | Clammy by mid-afternoon |
| Support | 3D pouch: room, not squeeze | Flat front |
| Guarantee | 30 days, even after washing | 14 days, unworn only |
The test
Six months. Twenty washes.
We sent a pair to an independent tester before launch: six months of wear, twenty washes at 40°C, and two deliberate 90°C stress washes we don’t even recommend. The fabric, fit and waistband held up better than they expected. Read the full, unedited review, including the parts that weren’t perfect.
Try them for 30 days. Zero risk.
We are confident these are the best boxer briefs you have owned. So every order carries a 30-day fit guarantee.
Not convinced? Send them back, even after wear and washing, and you get a full refund. We pay the return shipping.
Questions
Do they ride up?
The legs are designed to stay put: balanced elastic, the right inseam and fabric with real recovery. In our six-month wear test, reduced ride-up was one of the clearest results.
Which size should I choose?
The size you normally wear, from S to XXL. The shape comes from the 3D pouch and the fabric, not from tightness. Between sizes? Take the larger one.
How do I care for them?
Machine wash on 40°C (104°F) with like colors on a gentle cycle, and skip the dryer. That’s how the softness lasted 20 washes in our test.
What if they don’t fit?
You have 30 days: our risk, not yours. Full refund, even after wear and washing, and we pay the return shipping.
Where do you ship?
Across the US. Free shipping, 1–3 business days, straight to your mailbox.
What is TENCEL™ Modal?
TENCEL™ Modal is a cellulose fiber made by Lenzing from sustainably sourced wood pulp. It's softer and smoother than cotton and handles moisture better, which is why KLOON is made from 95% TENCEL™ Modal and 5% elastane.
How do packs and returns work?
Every pair in a pack ships in the size you choose at checkout: a 5-pack in size M means 5 pairs of size M. The same 30-day fit guarantee applies to every pack size, even after wear and washing.
Does the 20% Founder discount stack with pack pricing?
Yes. Your personal 20% lifetime discount applies on top of whichever pack price you choose, it's not replaced by bundle savings, the two combine.
Stays in place
Balanced leg tension and the right inseam. Nothing to adjust, even after a full day.
Supports without squeezing
A 3D pouch built for room, not compression.
Ultra-soft TENCEL™ Modal
95% TENCEL™ Modal fibers, smooth against the skin from the first minute.
Tested for washing and everyday wear
Wear-tested for six months and twenty washes before we sold a single pair.