Our Trunk is made of Modal. The very minimal design gives you the comfort with just the right amount of coverage.
- 90% Modal / 10% Spandex
Luxuriously soft, ultra-breathable, and sustainable—just perfect for underwear.
Modal is a high-end fabric made from beech tree fibers, offering an unbelievably soft touch with exceptional breathability. Unlike cotton, Modal production uses 10-20x less water, making it a more sustainable choice without compromising on comfort.
Our Trunk is made of Modal. The very minimal design gives you the comfort with just the right amount of coverage.
- 90% Modal / 10% Spandex
Luxuriously soft, ultra-breathable, and sustainable—just perfect for underwear.
Modal is a high-end fabric made from beech tree fibers, offering an unbelievably soft touch with exceptional breathability. Unlike cotton, Modal production uses 10-20x less water, making it a more sustainable choice without compromising on comfort.
- Machine wash cold at 30°C (86°F) with similar colors
- Do not bleach
- Hang drying is recommended to maintain fabric quality
- Machine wash cold at 30°C (86°F) with similar colors
- Do not bleach
- Hang drying is recommended to maintain fabric quality
Onishi was born from a simple idea: underwear should make you look and feel sexy—without loud logos or distractions. Most men’s underwear is over-branded, uncomfortable, and designed to promote the brand, not the wearer. We wanted something different.
That’s why Onishi was created—to bring you sleek, minimal underwear that feels like an extension of you. No big logos. No distractions. Just the perfect fit.
At Onishi, we believe underwear should be about you, not the brand. That’s why our pieces are non-branded, timeless, and designed for confidence, comfort, and self-expression—without the unnecessary noise.
Onishi was born from a simple idea: underwear should make you look and feel sexy—without loud logos or distractions. Most men’s underwear is over-branded, uncomfortable, and designed to promote the brand, not the wearer. We wanted something different.
That’s why Onishi was created—to bring you sleek, minimal underwear that feels like an extension of you. No big logos. No distractions. Just the perfect fit.
At Onishi, we believe underwear should be about you, not the brand. That’s why our pieces are non-branded, timeless, and designed for confidence, comfort, and self-expression—without the unnecessary noise.
- Moves with you – no bunching, no digging, no restrictions
- Silky soft feel – comfort that lasts all day
- Breathable & moisture-wicking – keeps you fresh and cool
- Non-branded look – because your underwear should be about you
- Moves with you – no bunching, no digging, no restrictions
- Silky soft feel – comfort that lasts all day
- Breathable & moisture-wicking – keeps you fresh and cool
- Non-branded look – because your underwear should be about you
Trunk
Our Trunk is made of Modal. The very minimal design gives you the comfort with just the right amount of coverage.
- Low waist
- Elastic waistband covered by fabric
- 90% Modal / 10% Spandex
- Made in Bali, Indonesia
- Non-branded
- Screen printed label
20% off when you buy 3+ (same style only)
Add 3 or more of the same style and you’ll automatically save 20% at checkout.
No code needed. Feel free to mix and match colors and sizes, as long as they’re the same style.
It’s our way of saying thanks for stocking up on your favorites.