Anti-Gravity Trunks

Size Guide
Deep Black
Flat Gray
Forest Green
Ocean Blue
Polar White
  • Feels Like Going Commando. In Space.
    Krakatoa knows men need room up front, so we decided to give it a special feature, our famous U-Mongous Front Cup. Besides being spaciously supportive, you won't ever need to adjust yourself again. For real. 
    We also gave it a luxurious waistband and legs that stay put, plus a fabric so thin and smooth that is 3X softer and 50% more breathable than cotton.

    Krakatoa is your essential underwear. Enjoy.

If you have any questions or concerns, please contact us!

Customer Reviews

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Sizing Guide

Krakatoa is designed to be flushed with your skin. There is no need to buy a size larger, as the front pouch eliminates "The Squeeze", and the 3-way stretch fabric conforms gently around your body. You want it snug, not loose, for maximum comfort.

Measure your waist size:
Wrap a measuring tape around your navel, at the narrowest part of your torso. Place a finger in between the tape and your body, for a comfortable fit.


most comfortable boxer briefs

*One thing to note, our XL is a bit larger, covering much of XL and XXL sizes.

In Between Sizes?
Krakatoa has a front pouch that conforms with your anatomy, so even if the undies feel snug around your legs and butt, your package is still comfy, so go for a smaller size for a snug fit. If you don't like it or the size was not correct, no worries, we will send you another pair on your correct size at no cost to you. 

Want help choosing a size?
Give us a call on (888) 546-2125, Monday-Friday 9AM-5PM PST, or send us an email at and we will help you find the perfect Krakatoa size for you.

Krakatoa No Bullshit Guarantee:
Our goal is to give you unparalleled comfort on your underwear, so if you don’t get the fit you want on your first pair, give us a call on (888) 546-2125 or send us an email at, we will send you a different size at no charge.