• In stock, ready to ship
  • Inventory on the way
Regular price$34.00
/
Shipping calculated at checkout.

Size chart
Waist(in)
BRAND XS SMALL MEDIUM LARGE X-LARGE XX-LARGE
Bike Athletic 28-29 30-31 32-33 34-36 37-39 40-42
Calvin Klein 24-26 28-30 32-34 36-38 40-42 44-46
ExOfficio -- 30 32-34 36-38 40-42 44-46
Mack Weldon -- 28-30 31-34 34-36 36-40 42-46
PSD Underwear 24-26 28-30 32-34 36-38 40-42 44-48
Rhone 27-29 29-30 31-33 34-36 37-39 40-44
Stance 28-30 30-32 32-34 34-36 36-38 38-40
Tommy Hilfiger 30-32 32-34 34-36 36-38 38-40 40-42

Absolute Essential: BOXER CORTO SIBERIA NEGRO

The foundation of a modern wardrobe. The Siberia Negro Short Boxer is the ultimate "daily driver." While bold colors have their place, every collection needs the timeless reliability of a solid black trunk. The "Siberia" line represents Mundo Único’s commitment to minimalist perfection—clean lines, a professional aesthetic, and the unparalleled comfort of the brand's anatomical engineering.



🔬 Anatomical Excellence: Copa Unico

The Siberia Negro isn't just about the color; it's about the fit. It features the patented Copa Unico, a design specifically engineered for male wellness:

  • The Cool-Zone Advantage: By lifting and separating the anatomy from the thighs, the pouch promotes airflow and maintains a lower temperature, which is essential for intimate health and fertility.

  • Non-Stop Support: Whether you’re at the office or the gym, the pouch provides a secure, "locked-in" feel that eliminates the need for uncomfortable adjustments throughout the day.

  • Anti-Chafe Barrier: The structural design ensures zero skin-on-skin contact in sensitive areas, making it the perfect choice for long commutes or active lifestyles.

🧵 The Siberia Build Quality

Mundo Único's "Siberia" series is designed for maximum durability and soft-touch comfort:

  • Premium Micro-Stretch Fabric: A high-grade blend that feels like a second skin. It is lightweight, breathable, and designed to move with your body without losing its shape.

  • The "Bóxer Corto" Cut: This trunk silhouette features a shorter leg length than standard boxer briefs, providing a streamlined look that stays hidden under tailored trousers and slim-fit denim.

  • Deep Pigment Tech: The "Negro" (Black) dye is formulated to resist the "fading to grey" effect, ensuring your underwear looks brand new even after dozens of washes.

  • Contoured Comfort Waistband: A wide, non-roll elastic band that sits comfortably at the hip, providing a secure fit that doesn't pinch or leave marks.



📋 Product Specifications:

  • Brand: Mundo Unico USA

  • Style: Bóxer Corto (Short Boxer / Trunks)

  • Color: Siberia Negro (Solid Black)

  • Price: $23.80 (On sale from $34.00 – Save 30%!)

  • Available Sizes: S, M, L, and XL (Size XX currently sold out).

  • Shipping: Free Standard Shipping included.

Model is protected under applicable copyrights trade marks and other proprietary including without limitation intellectual property rights and international treaties.

Shipping Policy

  • Local Warehouse: orders ship the next business day.
  • Remote Warehouses: processing varies by location — most ship within 2–3 business days, with a range of next-day up to 5 business days.
  • Once your order ships, you'll get a tracking number by email.
  • Orders of $60 or more shipping within the U.S. ship free.
  • Estimated transit: 2–5 business days (USPS Ground Advantage) for U.S. orders.
  • International orders: 5–14 business days via DHL eCommerce, depending on destination and customs processing.
  • If your order hasn't arrived within 2 weeks of the estimated delivery window, contact us and we'll sort out a replacement or refund.

Questions? Reach us anytime at byron@byronsbritches.com.

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

You may also like