the black trunk
the black trunk
- ❄️ stays cool and dry. engineered for aussie heat
- 🌿 finer and softer than silk. certified lenzing™ micro modal
- 💪 built to last. 2× stronger than bamboo, wash after wash
- 🩲 diamond support pouch. stays in place, all day
- ♻️ 10× less water than bamboo. 30× less than cotton.
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description
description
we use certified lenzing™ micro modal — one of the world's finest fabrics. softer than silk, 3× softer than cotton, and more durable than bamboo. it gets better with every wear.
size guide
size guide
size matters...when it comes to your undies, anyway.
| Waist / Pant Size | Size |
| 26-27 | XS |
| 28-30 | S |
| 31-33 | M |
| 34-36 | L |
| 37-40 | XL |
| 41-43 | XXL |
care guide
care guide
To preserve the quality of your ohyea underwear, we recommend a cold, gentle hand or machine wash. Line drying is encouraged as the tumble-dryer can damage or misshape your underwear.
Do not bleach, iron or dry clean your ohyea underwear.
see ohyea underwear in action
designed in australia. built different.
because you spend all day in them. make it count.
Lenzing micro Modal™ fibre
the softest underwear you'll ever wear — made with Lenzing Micro Modal™ to drape your body and keep you cool in the Aussie sun
supportive pouch
no fishnets, no extra fabric that rubs. just an internal supported pouch that keeps your fellas in place all day, everyday
subtle logo design
no advertising another man's name on your underwear. no big logos, subtle style on our super soft waistband
don't just take our word for it
★★★★★
"
I've now been trying these out for around 2 weeks and can say they are easily my go-to pair in my drawer
not all fabric is equal.
lenzing™ micro modal outperforms bamboo and cotton on every measure that matters.
lenzing™ micro modal
certified · sustainable · premium
softer, longer lasting, certified.
bamboo
generic · chemical process
feels good at first. wears out fast.
cotton
standard · mass market
rough, stiff, and scratchy.
fabric performance data sourced from lenzing AG independent testing.
3x
longer lasting than bamboo
engineered to outlast
everything else.
we started with one question — what's the best underwear we can make? we stopped when we had the answer.
one style. one colour. made with Lenzing™ Micro Modal. you'll love it.
shop now →frequently asked questions
no. the trunk cut and diamond support pouch are designed to stay in place all day. the fabric's natural stretch and body-forming properties mean they move with you, not against you.
the diamond support pouch is an internal structured pouch that keeps everything in place without extra fabric, fishnets, or uncomfortable seams. it provides natural separation and support without digging in — so you can wear them all day without thinking about them.
yes. lenzing™ micro modal is hypoallergenic and non-irritating, making it ideal for men with sensitive skin. the fabric is smooth with no rough seams or abrasive textures — just soft, breathable comfort against your skin all day.
yes. lenzing™ micro modal requires up to 20× less water than cotton and uses a closed-loop process that recycles 99% of chemicals and water. the beech trees are from fsc-certified forests, and ohyea is fully biodegradable at end of life.
a pair of ohyea starts at $29 — and lasts significantly longer than cheaper alternatives that pill, stretch, and fade after a few washes. when you factor in cost per wear, it's actually the better value.
standard shipping within australia takes 5–7 business days. free shipping is included on all orders of 3 or more pairs.
visit our returns page for full details on our return and exchange policy.