Order by 12/21 (9am) for delivery before 12/25 Details >

AIRKNITx HD Trunk $26

Our light-as-air trunk is built to keep you dry, fresh, and comfortable, to the end of your workout or workday.
If you don’t love your first pair of underwear or socks, we’ll send you a different pair, or issue you a full refund—no return required.

Size Guide


Start saving from your very first order. Depending on the amount you spend, you can earn these benefits: 

  • Free shipping on orders over $50
  • 10% off $100+
  • 20% off on $200+

After your first order, you’ll enter our Weldon Blue loyalty program and lock in a lifetime of free shipping. Spend a total of $200 to add on 20% off every order for a full year.

Free shipping over $50, and free returns always

  • Flyless pouch
  • Breathable microfiber
  • Four-way stretch
Materials & care
  • 50% Polyamide / 33% Polyester / 17% Elastane
  • Machine wash cold with like colors
  • Tumble dry low
  • Imported

The Fabric

The Fabric


We developed a limited-edition version of our ultra-breathable AIRKNITx fabric, with new moisture-wicking texture zones, and richer, deeper colors.

You might also like…

Ratings & Reviews