Anti-Gravity Trunks
Anti-Gravity Trunks
3" deep pouch, 2" inseam, 95% MicroModal, Stay Flat Waistband, No Fly
Machine wash on cold, Dry on Medium
Size Guide
Save with Bundle Pricing
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.
Couldn't load pickup availability
📦 Orders ship within 1-2 business days
The Details
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
1st Order Fit Guarantee
Our number one goal is that you're happy with your purchase.
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 purposes.
After this first pair, all underwear must be unworn, unwashed, in the original condition and packaging you received them in for a refund.
Due to the nature of our product we cannot accept returns of worn products. We will only be able to provide store credit for worn products limited to your first pair.
Please contact us directly at support@krakatoaunderwear.com to discuss options.
52 Wash Guarantee
52 Wash Guarantee
We want you to feel confident making your purchase from us. 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 resulting from a manufacturer's defect before 52 washes or 12 months, we'll replace them for just the cost of shipping.
The guarantee excludes damage caused by neglect or abuse, by intentional damage, accidental damage, color fade, pilling, stains of any kind, and deliberate attempts to damage the product.
Applies to any product purchased, does not apply to any product provided as a replacement.
Send us an email at support@krakatoaunderwear.com with the subject "52 Wash Guarantee Claim". Please be sure to include photos of the damage. We will be in touch shortly after.
Full details can be found HERE.
Free US Shipping on Orders $75+
Free US Shipping on Orders $75+
We provide free basic shipping for all orders over $75 in the United States.
















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?
All returns are available for 60 days following their delivery date.
We’re happy to accept any items that are unused, unopened, unworn, and in their original packaging.
WE ARE UNABLE TO ACCEPT ANY PRODUCTS THAT HAVE BEEN WORN.
We strongly encourage you to add shipping insurance and hassle free returns to your orders as it appears in the cart, especially if it’s your first order.
We strongly recommend that you only try on only one pair for sizing purposes.
You can start a return at any time in our Returns Portal.
Given the nature of our product, and for health and safety reasons, we are unable to provide exchanges at this time.
Buyer will be responsible for any associated return shipping costs.
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 want you to feel confident making your purchase from us. 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 resulting from a manufacturer's defect before 52 washes or 12 months, we'll replace them for just the cost of shipping.
The guarantee excludes damage caused by neglect or abuse, by intentional damage, accidental damage, color fade, pilling, stains of any kind, and deliberate attempts to damage the product.
Applies to any product purchased, does not apply to any product provided as a replacement.
Send us an email at support@krakatoaunderwear.com with the subject "52 Wash Guarantee Claim". Please be sure to include photos of the damage. We will be in touch shortly after.
Full details can be found HERE.
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:
-
Learn More
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
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.
- JordanVerified ReviewerReviewingAnti-Gravity TrunksRated 5 out of 5 starsThe hype is real
Threw out my old CK's... these are the best underwear I've ever worn, hands down. I thought I was between sizes because I'm a 33/34 but have a big round booty and medium sized package. The M (34-37) fits PERFECT. Super soft fabric, the band is nice, super premium feel and high quality construction. The intro pair is a great deal and I'm happy to buy more.
FeaturedWas this helpful? - Jared D.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsSuper soft and comfy!
Perfect for guys who need more room. Super soft and so far, durable.
FeaturedWas this helpful? - Paul F.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsSuper Comfortable
I don't usually like trunks, but this brand has made me a believer. Always soft and always supportive
FeaturedWas this helpful? - Jonathan K.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsBest trunks I own!!
These trunks are super comfy and the material is super soft and fits everything perfectly! I usually wear a trunk or thong and I love both from Krakatoa! I am super happy and will definitely be buying more from them in the future! The fit is great and feels like I’m being supported and still feel like wearing nothing.
FeaturedWas this helpful? - Phil C.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsI love these trunks!
I’ve never really cared for trunks because they didn’t seem to support me where I needed it, I generally went for briefs. However, these trucks do a great job of supporting me and yet making me feel free and comfortable because the fabric is so giving and yet supportive. think I’ll go back to brief again at least not as long as these are available! And I hope they always will be.!!!
FeaturedWas this helpful? - Anthony Y.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsLove These!!
I love all the products from Krakatoa everything is so comfortable and very soft barely even know you are wearing them. The Anti gravity are great for that extra little lift 😏. I would recommend to go a size up if you have Larger Legs/Butt like my self. My Waist size is medium but I wear a large as the medium is a bit tight do to larger legs and butt. 🙈
FeaturedWas this helpful? - Lou S.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsBest underwear Ever
These are the best underwear I’ve ever bought! They are so comfortable , I forgot that I was wearing underwear. Keeps everything in place. Definitely plan on buying more
FeaturedWas this helpful? - Russell R.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsFeels great
Nice to have comfortable trunks. My thighs don’t rub in them.
FeaturedWas this helpful? - Michael W.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsPlease don't ask...
What I mean is, don't ask me how many pairs I bought to replace my old outdated underwear closet. Once I have tried these, I have thrown out so many of my old pairs of underwear to replace them with these. I used to wear the Adidas brand that I could find at Costco or Kohl's and the like. These are life changing just because they aren't crushing my bits like those other pairs. My partner loves the fabric and it really does feel so much better than others. They hold up well in the wash and I'm just stocking up between paychecks. I know, I felt a bit hurt in the wallet seeing the prices, but I have over 20 pairs now and well make use of the 20% off for 7 pairs plus with free shipping to boot.
Do yourself a favor and just splurge on it and see what you've been missing.
FeaturedWas this helpful? - Kyle H.Verified BuyerReviewingAnti-Gravity TrunksRated 5 out of 5 starsGreat Fit for the Well Endowed
Bought my ex a pair of these. We were looking for a pair that would fit his big balls, and these have a roomy pouch that support them well.
FeaturedWas this helpful?