ProActive Sport Boxer Brief 3", Black

4.9 (2,419 reviews)
$32.00
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Ultra-thin mesh curtains, adjustable volume pouch, and no-ride construction for nonstop days.

When the day doesn’t blink, neither can your base layer. Adjustable volume dials in support for your body and your mission. The ultra-mesh curtains separate and ventilate, the narrow ergonomic gusset frees the hips, the no-ride legs stay put under miles and armor. Anti-odor. Quick-dry. Office, range, travel: one layer built for everything.

Performance Benefits:
Custom fit — adjustable pouch volume for variable activities and climates
Vent where it matters — ultra-mesh keeps the micro-climate cool
Friction off — narrow gusset + smooth finishes reduce rubbing
Stays fresh — antimicrobial, low-odor for extended wear
Field-ready — durable knit, shape retention, easy care

Tech Proof:
Mesh drying speed: 120-160 g/h
Cooling effect: up to 6-7°C (10-12°F)
Shape recovery: 90-95%

Adjustable volume pouch — support customizable to your build, activity, and climate
Ultra-thin mesh curtains — targeted ventilation zones that separate, cool, and dry fast
No-ride construction — mid-length legs with binding finish stay put after miles under gear or armor
Ergonomic narrow gusset — frees hip movement and reduces friction during training
4 cm jacquard waistband — secure fit without digging, twisting, or leaving marks
Precision sizing — tailored fit across various body types, ensuring maximum support and flexibility

Quick-dry, breathable fabric — wicks moisture, manages heat, and keeps you fresh longer
Antimicrobial treatment — fights odor for extended wear in high-intensity conditions
Soft, durable materials — shape-retaining knit designed for long-lasting comfort and performance
Hypoallergenic and skin-safe performance knit
Easy care — maintains shape and comfort over time

Care instructions:

  • Wash at a maximum temperature of 30°C (86°F)
  • Iron at low temperatures
  • Do not use bleaching agents
  • Do not use tumble dryers

*Color and decorative stitching may slightly differ from photos.

All available shipping options will be visible at checkout. We ship orders within 10-14 business days, but this can increase during promotional periods. All sales are final and cannot be returned for a refund or exchange. For more information, check out our Frequently Asked Questions page.

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Have a question? We’re here to help

Check out the most common questions our customers ask. If you need more help, please contact our support team.

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Our customer support is available Monday to Friday, from 10 AM to 7 PM.
What makes MAN’s SET underwear different?
MAN'S SET underwear is designed with a patented anatomical pouch for natural positioning, reduced friction, and maximum comfort. The construction is based on medical research to support male anatomy and reproductive health. We produce in our own facility to ensure consistent quality, and every model is focus-group tested for perfect fit and freedom of movement.
Where is MAN'S SET manufactured?
MAN'S SET underwear is proudly produced in our own facility in Ukraine. This lets us control every step of production and keep the highest quality standards in every pair.
Can I return or exchange underwear?
For hygiene reasons, underwear and socks can’t be returned. If your item has a manufacturing defect, we’re happy to exchange it. Please email info@manset.com.ua to request an exchange.
How can I contact support?
If you have any additional questions, please email us at info@manset.com.ua. Our team is happy to help!
What is shipping information?
We ship worldwide. For the United States:

Free Shipping: orders $65+, delivery in 10–14 days.
Priority Processing & Shipping Insurance: $21.55, ~10-day delivery; faster handling and extra protection.
Standard Shipping: $17.99, 10–14 days for orders up to $65.

At checkout you’ll see options and speeds for your country. Both standard and express shipping are available globally.