Underdog® x Silktouch TENCEL™ Modal Air Boxer Trunk
Extra 15% Off Code: GIFT15
*Offer Ends in:
This product is part of our Everyone Loves an Underdog® collection, the charitable arm of Tani Japan. Proceeds from sales of this product, minus production cost, will go to fund Tokyo-based Dog Shelter and Cloudy in Ghana.
Fabric
- 94% TENCEL™ Modal x Micro Air, 6% elastane
Comfort
- Ultra Soft and Gentle On Skin
- Enhanced Breathability
- Stretchable, Elasticated Waistband tailored to best fit
- Contoured pouch with keyhole
- Long Lasting, Durable, Colour Retention
- Unfavourable for Bacterial growth, Odor Reduction
Sustainable
- Botanic Origin
- Biodegradable
- Ethical and Sustainable Production
- Uses less energy and water
Your Everyday Support
These premium Tani Boxer Briefs feature an smoother than silk, breathable, feather light Tencel™ Modal x Air that is sustainably sourced from beech wood, guaranteed to stay smooth and keep you comfortably supported at all times.
Your Impact
- Made to last, more durable
- Lower carbon emissions due to TENCEL™ sustainable production methods
- Saves 30% Power and 90% Water
- Certified biodegradable
The Softest and Silkiest
Crafted with TENCEL™ Modal x Micro Air fibers, the finest wood-based fibers available. It is 20% finer, 60% softer than regular modal and more than 2 times as soft as conventional cotton. The finer fibers also results in a lightweight garment with all the great comforts of modal.

Carbon-zero TENCEL™ Modal
Not all modal are made the same. We work with Lenzing to reduce the carbon footprint of our products by 80%. Starting in 2022, we have been using Carbon-zero TENCEL™ Modal further reducing our footprint compared to generic modal.
Stay Comfortable
TENCEL™ Modal fibers naturally manage the transport away moisture, keeping your skin from feeling damp and uncomfortable. Which means you feel cooler when its hot outside and warmer when its cold.
More Durable Than Cotton
Using patented Eco Color technology to prevent color fading. TENCEL™ fibers are twice as strong as conventional cotton and can withstand repeated wash and dry cycles.

All Natural and Sustainable
Sourced from sustainable beech wood in Europe and produced in a sustainble process which saves both energy and water.

Back to nature
Certified as biodegradable and compostable under industrial, home, soil, fresh water and marine conditions, thus they can fully revert back to nature.
- Gentle Cycle
- Do Not Bleach
- Tumble Dry Low
- Warm Iron
Delicate Material: Recommended to turn garment inside out before wash and dry.