Free shipping $75+ · 30-day fit guarantee
Modal BriefFeels like nothing underneath

The closest thing
to nothing.

Cut from beechwood TENCEL™ Modal. Cool to the touch, soft on skin, barely there under clothes.

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100,000+ pairs sold · 30-day fit guarantee

★★★★★4.8 · 200+ reviews · customers mention cooling, softness, and no bunching
Modal Brief
Modal Brief
Model 001
Foundation Brief
★★★★★4.8 · 200+ reviews
$75.00Save $12$25.00/pair
Choose your set
Single
1 pair
$29$29.00/pair
Most Popular
3 Pack
3 pairs
$75$25.00/pair
Save $12 · Free shipping
Best Value
7 Pack
7 pairs
$139$19.86/pair
Save $64 · Free shipping
Color
Noir
Size
Runs slightly small. Size up if between sizes.
·
Qty
1
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$75+ orders
30-Day Guarantee
Love it or we fix it
10°F
Cooler than cotton
Cooling Knit

Runs cool. All day.

A breathable knit helps heat move out and moisture move off skin, so the first layer stays cool without feeling technical.

10°F cooler than cotton
Beechwood Modal

Hotel sheets. On skin.

Cut from beechwood TENCEL™ Modal for a cool hand feel and a softer touch from the second it hits skin.

TENCEL™ Modal · OEKO-TEX® certified
Barely-There Fit

No rub. No bunch.

A smooth, stay-put fit reduces friction under clothes without squeezing, riding up, or making itself known.

Low friction · Smooth waistband
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30-day guarantee · Free returns

What customers notice first
★★★★★4.9 · 200+ reviews
★★★★★
Cooler than my cotton pairs
Switched from a cotton multipack for summer. These feel cooler under jeans and do not stay damp by lunch. I sized up and was glad I did.
M
Marcus R.
3 Pack
1 month ago
★★★★★
Good for lifting and work
I lift before work and sit at a desk most of the day. The legs stay put, the waistband does not dig, and they do not feel like compression shorts.
C
Colby A.
7 Pack
1 month ago
★★★★★
He actually asked for more
Bought the 3 Pack for my husband because he runs hot and hates tight waistbands. He wore them twice and asked if I could order more.
S
Sarah M.
3 Pack
3 weeks ago
★★★★
Size up if between sizes
I am between medium and large and went large. Right call. The fit is close at first, but the fabric has enough give without getting loose.
D
Dillon W.
3 Pack
2 weeks ago
★★★★★
Materials were the reason I tried them
Wanted something that did not feel plasticky or overly athletic. The TENCEL Modal is softer than I expected, and the waistband has held up after a few washes.
N
Nick S.
7 Pack
1 week ago
★★★★★
No bunching during soccer
Played rec soccer in these and they stayed put the whole game. Not magic, just lighter and less swampy than my usual briefs.
J
Jay T.
3 Pack
4 days ago
FAQ
Frequently asked questions
Everything you need to know about the Modal Brief.
Why not 100% cotton?
Cotton absorbs moisture and holds onto it, leaving you wet and uncomfortable. TENCEL™ Modal beech tree fibers are naturally moisture-wicking and temperature-regulating, keeping you dry, cool, and comfortable all day.
Why does Andros cost more than basic underwear?
Basic underwear is built around cost. The Modal Brief is built around daily feel: cooler, softer, smoother, and more breathable against skin, with TENCEL™ Modal and a low-friction fit designed for the layer you wear longest.
How does the Modal Brief fit?
The Modal Brief is designed with a modern, supportive fit and a waistband that stays in place without digging in. It runs slightly small. If you are between sizes, size up.
What makes TENCEL™ Modal different?
TENCEL™ Modal is derived from sustainably harvested beech trees. The fibers are softer than cotton, naturally breathable, and regulate temperature in real time. Cooler when it's hot, warmer when it's cold.
Is Andros a medical product?
No. Andros is not a medical product. It is designed for men who care about heat, breathability, skin contact, and all-day comfort in the base layer they wear every day.
How should I care for the Modal Brief?
Machine wash cold with like colors. Tumble dry low or hang to dry. Do not bleach or iron. These care instructions will help maintain the softness and performance of the fiber over time.