Skip to product information
1 of 16

Anti-Gravity Trunks

Anti-Gravity Trunks

4.8
Rated 4.8 out of 5 stars
1,092 Reviews
Regular price $ 30.00 USD
Regular price $ 25.00 USD Sale price $ 30.00 USD
Sale Sold out

3" deep pouch, 2" inseam, 95% MicroModal, Stay Flat Waistband, No Fly

Machine wash on cold, Dry on Medium

Size Guide
Size
Color

Save with Bundle Pricing

Save 10% when you buy 3+ pairs.
Save 20% when you buy 7+ pairs.

Mix and match items to unlock savings.
Savings automatically added to your cart.

📦 Orders ship within 1-2 business days

The Details

The Original Krakatoa Trunk that Started it All.

With a large, 3" deep front pouch engineered to separate you from your thighs and keep you comfortably supported, the Anti-Gravity Trunk is your best partner for life's adventures.

Form-fitting ultra-premium 95% MicroModal fabric holds you softly and leaves you feeling fresh all day.

Wide and ultra-smooth waistband won't flip or mark your skin.

Legs that don't roll up or bunch up.

Inseam: 2 inches

52 Wash Guarantee. Because we can.

1st Order Fit Guarantee

Our number one goal is that you're happy with your purchase.

If something doesn't fit right on your regular priced Krakatoa, let us know and we’ll work with you to make it right.

Try on a single pair and make sure it's perfect for you.

If you bought multiple pairs, make sure you try ONLY ONE PAIR for fitting before you decide to use the rest.

After this first pair, all underwear must be unworn, unwashed, in the original condition and packaging you received them in for a refund.

52 Wash Guarantee

We've built a tough product with advanced stitching, and the very best materials we could get our hands on.

That said, you should follow the care instructions: wash it cold and dry in medium temperatures with similar soft fabrics, for best results and durability.

We provide a 52 Wash Guarantee which is triggered by either 52 washes or 12 months from the date of purchase. If your item has any structural damage before 52 washes or 12 months, we'll replace them for just the cost of shipping.

Free US Shipping on Orders $75+

We provide free basic shipping for all orders over $75 in the United States.

View full details

Find your size

You'll need a a pair of your existing underwear, a flat surface, and a measuring tape.

I'm Alex, I made these for you.

THE FEATURES YOU ASKED FOR

Every little detail was obsessively fine-tuned, to deliver you an underwear experience like no other: 

FULL SUPPORT POUCH
All the Support, None of the Fuss.

Say goodbye to readjustments! Our large, 3" deep front pouch is engineered to separate you from your thighs and keep you comfortably supported all day.

No fly? No problem! Just pull the waistband down and do your business.

THE FINEST MICROMODAL FABRIC
Exceptional Softness and Breathability.

No synthetics here -and no PFAS.

Feel softness like never before with an ultra-premium, hand selected 95% MicroModal fabric. We source only the best MicroModal because comfort is our #1 goal. (Learn about MicroModal). We just add 5% of Spandex to allow for it to move with you.

We never skimp on the quality of our fabrics and materials, neither on the craftsmanship. These products go on your softest, most sensitive parts. We won't settle for anything less than the very best.

SOFT STITCH HEMS
For Legs That Stay Put.

Our Trunks are perfect for active guys who prefer a shorter leg that fits comfortably under pants or shorts. Whether it’s daily wear, hiking, sports, or lounging, they transition effortlessly from gym shorts to suits with aplomb.

UNFLIPPABLE WAISTBAND
Art On Your Body.

Our waistbands are wide, smooth, don't leave marks, and are truly unflippable, offering a secure fit that prioritizes style and your comfort over branding. We focus on modern designs rather than flashy logos, framing your body beautifully.

Inside, you’ll find positive, self-affirming words designed to motivate you daily, inspiring you to be a better person to yourself, and to those around you.

Experience the perfect blend of style and substance with a waistband that uplifts and empowers you.

HEY ALEX, I HAVE QUESTIONS!

What should I know about the fit?

The Anti-Gravity Trunk is designed with a 2" inseam. The legs are designed to stay put, but can ride up a little depending on activities. The pouch is designed to be large enough to provide you room, while being double layered to also provide support and privacy for your privates. All of this is benefited by our use of MicroModal which is incredibly lightweight and breathable.

What if I'm in between sizes?

Our sizes run pretty true and the materials do have stretch to them.

But if you're not sure which size is going to be the best for you, consider these three things:- Your waist in inches (pants size is OK).

- If your legs touch at the thighs.
- If you have a small, normal or large butt.

If your legs touch and your butt is large, you might jump a size.

If you have a small butt and thin legs, you can downsize.

What's MicroModal fabric?

In a word. Soft.

Really soft, our MicroModal is hand-selected to be of the highest grade available.

MicroModal is a modern technical fabric that is manufactured with cellulose from renewable Beechwood trees. Compared with Cotton, it's odor-resistant, 3 times softer, 50% more breathable, and it's not nearly as polluting or water-wasting.

Why such a big pouch?

Men come in all different shapes and sizes but for years underwear failed to respect our anatomy.

Our pouch is designed for the majority of men out there to accommodate and coddle. It's a blend of being soft with some stretch where needed, but also supportive for all day comfort. You won't need to adjust yourself anymore, because sticking to your legs is a thing of the past.

When will my item ship? How long will it take to arrive?

Please allow 2-4 days for processing, and the usual shipping times from the USPS or UPS: inside the US you can expect to see your package between 3-6 days.

We'll send you a confirmation email with your tracking information as soon as it ships.

If you have any questions or don't receive an email, feel free to reach out via our Contact Us Page.

What is your returns and refunds policy?

Our number one goal is that you're happy with your purchase.

If something doesn't fit right on your regular priced Krakatoa, let us know and we’ll work with you to make it right.

Try on a single pair and make sure it's perfect for you.

If you bought multiple pairs, make sure you try ONLY ONE PAIR for fitting before you decide to use the rest.

After this first pair, all underwear must be unworn, unwashed, in the original condition and packaging you received them in for a refund.

How do I wash my Krakatoa?

Krakatoa is quite resistant to shrinking and fading, but machine-washing them in cold water using the delicate setting and drying in low heat will keep them looking fresher for longer.

Please do not bleach, iron, or dry clean your boxer briefs or trunks. You can also wash it by hand and lay it flat to dry, for great results.

What's your 52 Wash Guarantee?

We've built a tough product with reinforced stitching that lays flat and the very best materials we could get our hands on.

That said, you should follow the care instructions.

We provide a 52 Wash Guarantee which is triggered by either 52 washes or 12 months from the date of purchase. If your item has any structural damage before 52 washes or 12 months, we'll replace them for just the cost of shipping.

WHICH TRUNK IS BEST FOR ME?

Each Krakatoa Collection comes with a specific pouch and hem.
While they all share the same absurdly soft fabric and unflippable waistband, their pouches and hems are what set them apart.

Here is a quick guide:

  • The Original
    3" Sealed Pouch
    Stitched Hems
    2" Inseam

    Learn More 
  • 3" Low-Seam Pouch
    Top Horizontal Fly
    Stitched Hems
    2" Inseam

    Learn More 
  • 4" Deep StratoPouch
    Breathable Liner
    Seamless Hems
    1.5" Inseam

    Learn More 
  • Thin Caldera Pouch
    Low-Profile StealthFly
    Seamless Hems
    1.5" Inseam

    Learn More 

CHECK OUR REVIEWS

See how we have impacted guys from all walks of life.
Our products are only as good as the impact they have on those that experienced them.

4.8
Rated 4.8 out of 5 stars
Based on 1,092 reviews
Total 5 star reviews: 966 Total 4 star reviews: 86 Total 3 star reviews: 24 Total 2 star reviews: 11 Total 1 star reviews: 5
90%would recommend these products
Customer-uploaded media carousel. Press left and right arrows to navigate. Press space or enter to open more details.
Slide 1 selected
1,092 reviews
  • Heidi B.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    Excellent fit and feel

    My husband loves these, the material is so nice and comfortable and the fit is great! Highly recommend!

  • Mark R.
    Verified Buyer
    INTRO PAIR TRUNK
    Reviewing
    INTRO PAIR TRUNK
    Rated 5 out of 5 stars
    Extremely Comfortable

    The waist band is the best in the industry. The material is soft, breathable and form fits all day with no bunching, binding or climbing.

  • Gary S.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    New one & only brand to buy!!!

    Marvelous fit, best fit I’ve ever worn. Waist band is thought out and works. They don’t stretch and maintain their shape. No more other flavors for me. One stop go to brand for me. THANKS!!!!

  • BILL C.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    VERY COMFORTABLE

    COULD BE THE MOST COMFORTABLE PAIR OF UNDERWEAR I HAVE EVER WORN

  • Shelby R K.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    Love these trunks!

    Great pair of underwear and a great fit! I love these and will definitely be buying more!

  • CARL S.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    Undies

    Nice

  • Robert S.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    Anti-Gravity

    Great fit. Nice feel.

  • CRAIG J.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    First purchase but not the last

    I bought 3 different styles to try and well beyond my expectations. Super comfortable. Definitely will be reordering.

  • Patrick B.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    Krakatoa review

    Very comfortable!

  • James C.
    Verified Buyer
    Anti-Gravity Trunks
    Reviewing
    Anti-Gravity Trunks
    Rated 5 out of 5 stars
    Great trunks

    They are a little expensive but worth it for me. Most comfortable underwear.

Reviews LoadedReviews Added