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Vesuvius Trunks

Vesuvius Trunks

4.9
Rated 4.9 out of 5 stars
352 Reviews
Regular price $ 34.00 USD
Regular price Sale price $ 34.00 USD
Sale Sold out

Caldera Pouch, StealthFly, Seamless Hems, 95% MicroModal, 1.5" Inseam

Size Guide
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The Details

Let It All Hang.

Vesuvius Next Gen features the all-new Caldera Pouch—an extra-large, single-ply front pouch that cascades down, providing a natural, unrestricted feeling, almost like being naked. To enhance this experience, our exclusive low-profile StealthFly ensures no accidental escapes and offers discreet, easy access.

The Vesuvius Next Gen are the most natural-feeling underwear you ever tried.

With a short but comfortable 1.5" inseam and ultra low-profile seamless hems, they will stay put without pressure, invisible under your pants, and won't roll or bunch up.

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

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

Inseam: 1.5 inches

52 Wash Guarantee. Because we can.

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

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+

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

View full details

I'm Alex, I made these for you.

Find your size

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

THE FEATURES YOU ASKED FOR

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

Close up of Vesuvius with inverted fly in Hana Green

THE CALDERA POUCH
Super Thin and Flexible.

Elevate your comfort game with the all-new Caldera Pouch, designed for the ultimate in relaxation and ease. Slip into a world of barely-there comfort with our deep and low single-ply design, offering incredible flexibility and sensitivity. Experience a gentle embrace that feels like second skin, cradling your most delicate areas with care.

Say goodbye to discomfort as our design keeps you comfortably separated from your thighs, providing a soft hold without any pressure or compression. Embrace freedom and discover what true comfort feels like with the Caldera Pouch—where everyday wear meets extraordinary sensation.

micromodal v. cotton macro photo comparison

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 important parts. We won't settle for anything less than the very best.

Colorful waistbands in a square image.

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.

Closeup of Vesuvius Boxer Brief's seamless leg openings.

FLAT SEAMLESS HEMS
For Legs That Stay Put.

Seamless hems are a game-changer, offering unmatched comfort and a sleek look under any outfit. Their innovative design ensures they stay put without pinching or leaving marks, providing a smooth, barely-there feel against your skin.

Perfect for any activity, seamless hems eliminate visible lines, giving you a flawless silhouette even under the most form-fitting pants. Enjoy the freedom of movement and the confidence of a perfectly polished appearance with the low-profile seamless hems on Vesuvius Next Gen.

HEY ALEX, I HAVE QUESTIONS!

What's the Caldera Pouch?

Our new Caldera Pouch is a reimagined front pouch, featuring a U-shape design that offers a natural feel and relaxed support.
It's not designed for vigorous activities, because it's like you are Going Commando, but without sticking to your legs.
The innovative design gently cradles your genitals, allowing them to naturally fall into place for a super comfortable and natural fit.
Crafted from a single layer of our ultra-thin 95% MicroModal fabric, the Caldera Pouch offers a barely-there sensation while providing all-day comfort and breathability.

What should I know about the fit?

The Vesuvius Next Gen Trunk is designed with a short 1.5" inseam. The hems on the leg openings are seamless, for a stealthy look and supreme comfort, besides staying put all day.
The legs are short, hugging the crotch, and don't ride up.
The Caldera Pouch is designed to be large enough to provide you a lot of elasticity and room, while being single-layered to provide a loose feeling of separation.

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 pouches are 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:

  • Vesuvius side view with pouch showing lower pouch with horizontal fly.

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

    Learn More 
  • Blue Haleakala side view with closed pouch

    Lined StratoPouch

    4" Sealed Pouch

    Seamless Hems

    1.5" Inseam

    Learn More 
  • Pinatubo side view with pouch showing lower pouch with horizontal fly.

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

    Learn More 
  • Red Anti-gravity side view with closed pouch

    The Original
    3" Sealed Pouch
    Stitched Hems
    2" 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.

4.9
Rated 4.9 out of 5 stars
Based on 352 reviews
Total 5 star reviews: 333 Total 4 star reviews: 14 Total 3 star reviews: 2 Total 2 star reviews: 3 Total 1 star reviews: 0
98%would recommend this product
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352 reviews
  • Ryan
    Verified Buyer
    Rated 5 out of 5 stars
    The Ultimate Cradle for Your Crown Jewels

    There’s something about slipping into a pair of underwear that gets it—that understands a man’s body and celebrates it. From the moment I pulled these Krakatoa Vesuvius trunks out of the package, I could tell they were designed for a man who knows exactly what he’s got and isn’t afraid to let it be admired.

    The first thing that hit me? The fabric. Smooth, soft, seductive to the touch. But what really caught my attention? That pouch. I own a fair number of pouch underwear, but this? This was different. Bigger. Roomier. Almost daring me to see just how much it could handle. I’d sized up from a Small to a Medium after a tighter experience with a different Krakatoa model (see my video review of the Pinatubo trunks), and I’m glad I did. (For reference, I'm a 32" waist.)

    Pulling these trunks on felt like slipping into something made just for me. The waistband, perfect: secure but never restrictive, hugging my hips without pressing in. But let’s talk about the star of the show: the Caldera Pouch. Unlike other enhancing underwear that squeeze, lift, and present your package like it’s on display (and maybe it should be!), this pouch does something sexier: It simply lets you be. No artificial lift, no forced positioning. Just pure, effortless, natural masculinity for those guys whose junk puts the "man" in "manhood." It cradles you, holds you away from your legs, and lets your cock and balls settle into a soft, stretchy hammock where they can hang, swing, and move without…

  • John S.
    Verified Buyer
    Rated 5 out of 5 stars
    Vesuvius trunk , xs small

    I am 128lbs and xs trunk fit great. Love the way it feels and keeps your parts together. Easy to access and flops back into the pouch.

  • Steven R.
    Verified Buyer
    Rated 5 out of 5 stars
    The best pouch

    The softest and nicest pouch. Holds everything

  • Jonathan D.
    Verified Buyer
    Rated 5 out of 5 stars
    Vesuvius Trunks

    This material is just as soft as the other Krakatoa I have and supports in a whole new way!

  • Anthony O.
    Verified Buyer
    Rated 5 out of 5 stars
    BEST UNDERWEAR EVER!!

    The support is real. Like really real... That pouch keeps the goods all in place! I'm never going back to anything else. 💯

  • john r.
    Verified Buyer
    Rated 5 out of 5 stars
    My new favorite underwear

    I have always had problems with underwear strangling the boys. In past I found Andrew Christian to be a good fit. I tried aswemove brand , but as soft as they are the boys where still cramped. These vesuvius trunks are so comfy and supportive of the boys. Highly recommend and will purchase more. Side note they have been through several washes and are as good as new. My only dislike is the seam across my rear but all the other benefits out weigh that.

  • Tom
    Verified Buyer
    Rated 5 out of 5 stars
    I absolutely. Love them

    Very comfortable, and you hardly know you wearing eny underwear, I love them so much, I order one pair of brief..

  • John S.
    Verified Buyer
    Rated 5 out of 5 stars
    Really great trunks

    This is the third style trunks I have tried from Krakatoa, and are just as great as the others, and yet different.

    The fabric is smooth and nice as always, and the two colors I picked are especially nice with the multicolored waistband. What really makes these great is the spacious pouch that really lets the equipment stand out. Normally I don't buy underwear with a fly because the seams and edges are bulky and uncomfortable, but the fly on these is nearly invisible and makes access especially easy and comfortable. I like these so well I am going to try the briefs version the next time I order

  • Michael T.
    Verified Buyer
    Rated 5 out of 5 stars
    Absolutely Amazing

    I have previously ordered the Haleakala Briefs and Trunks and have been super happy with them. The Vesuvious trunks are super soft, comfortable and roomy - it feels like I'm not wearing anything yet everything is supported. I love the colors and waistband.

  • Connor H.
    Verified Buyer
    Rated 5 out of 5 stars
    Finally something that fits my size!

    After years of searching I have finally found trunks that fit properly. These feel incredible and make me feel attractive as well. The horizontal fly is also super sweet, as it really works as a fly. I no longer have to take off my shorts completely to use the restroom.

    The material also helps wick sweat away, keeping me comfortable all day.

    10/10 would recommend.