NEW ARRIVALS
Give the Gift “From the Core” This Winter.
Choii Boxers – New Winter Colors
Shipping begins early December.
Peak performance starts from within.
High-Waist Comfort. Inside Out Strength.
Effortless Fit That Stays in Place
No waistband. A unique vertical-stretch knit that moves with you.
Ultra-thin, feather-soft, never bulky—comfortable for everyday wear and every run.
Engineered to move with you, never against you.
Performance
High-Waist, No Pressure Design. Supports your daily rhythm and keeps your body balanced.
Comfort
Seamless, tagless, waistband-free. Stress-free wear, even for long hours.
Style
Function meets refined form—effortlessly blending with any outfit.
From Vision to Reality.
Turned what seemed impossible into possible.
No matter what anyone said, never gave up and kept trying.
After three years of persistence, finally made it happen.
Crafted with care, loved without condition.
Keeping the core warm is the key to focus and balance.
With this simple belief, we developed Choii Boxers®—one of the world’s first seamless, high-waisted boxer briefs.
Made with soft, flexible fabric that supports you from within, they help you deliver peak performance when it matters most.
NEWS
- LUNDATTE CEO to Speak at Osaka Expo: Sharing Startup IP Strategies
- 働きやすい職場環境整備を推進するために、カスタマーハラスメントに対する基本方針を定めました。
- [Media Appearance] LUNDATTE CEO Chiaki Kimura on Radio Nippon’s Yokohama Uposu RADIO+!
- Choii Boxers Featured on Japanese TV Show "DayDay."｜A Summer Gut Health Essential
- LUNDATTE, a men's intestinal health underwear brand, has been selected for the DMZ JAPAN program and will be visiting Toronto in August to explore the possibility of expanding into North America.
High-waisted. Without the waistband.
Boxer briefs born from turning “impossible” into comfort.
Seamless and Tagless, with Dynamic Stretch.
Engineered knit structure that moves in sync with you.
MADE IN JAPAN
Twice the Style.
Two colors. One pair.
Size Guide
- M size: Waist 76-84cm (30-33 inches) A basic size that fits most people with a standard body type.
- L size: Waist 84-92cm (33-36 inches) For those with a slightly stocky build or who prefer a more relaxed fit.
- XL size : Waist 92-100cm (36-39 inches) For larger body types or those looking for a more relaxed fit.
Waistband-free. Soft. Adaptive.
Designed high-waisted, without a waistband—defined by a soft, effortless fit.More stretch than ordinary underwear, adapting naturally to every movement and posture.
REVIEW
“Thinner than I imagined, with an incredible softness.I’d never seen high-waisted boxer briefs before—stylish, good for the body, and something I’ll keep wearing.”
– K.O.
“So light it feels like wearing nothing.
I used to get distracted by discomfort, but with Choii Boxers I forget I’m even wearing them. They’re my go-to whenever I need focus.”
– F.M.
