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Vesuvius Sports Boxer

Vesuvius Sports Boxer

4.9
Rated 4.9 out of 5 stars
374 Reviews
Regular price $52.00 CAD
Regular price $52.00 CAD Sale price $52.00 CAD
Sale Sold out

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

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The Details

Let It All Hang.

Vesuvius Next Gen Sports Boxer 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.

Vesuvius Next Gen Sports Boxer is the most natural-feeling underwear you ever tried.

With a sporty 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: 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 hello@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 hello@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.

View full details

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, with StealthFly.

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.

The new StealthFly is the exclusive horizontal fly from Krakatoa, incredibly easy to use and barely noticeable.

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 sensitive 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 Sports Boxer is designed with a 5" inseam. The hems on the leg openings are seamless, for a stealthy look and supreme comfort, besides staying put all day.
They are long enough to cover enough of your legs to add a wide layer of protection from chafing, while still staying inside your shorts.
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 like Going Commando.

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.

All Krakatoa 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 SPORTS BOXER 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 boxer briefs with pouch shown with 5" inseam

    U-Shaped Caldera Pouch
    Low-Profile StealthFly
    Seamless Hems

    Learn More 
  • Haleakala boxer briefs side view with pouch shown in 5" inseam

    Closed, Lined StratoPouch
    4" Sealed Pouch
    Seamless Hems

    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 374 reviews
Total 5 star reviews: 346 Total 4 star reviews: 23 Total 3 star reviews: 4 Total 2 star reviews: 1 Total 1 star reviews: 0
99%would recommend this product
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374 reviews
  • JAMES B.
    Verified Buyer
    Rated 5 out of 5 stars
    Like that naked feeling

    These underwear are just like being naked, light as a feather, but good support. Love the hidden fly. I was a loyal Tommy John supporter, but will be switching

  • Keyser S.
    Verified Buyer
    Rated 5 out of 5 stars
    Life changing underwear

    I stopped wearing underwear about 20 years ago because I could never find a brand/pair that I wanted to wear on a daily basis. They were always too tight, squishing down my girthy bulge into a flat hot pocket. Sure… if I was dressed nice for a business dinner, wedding, a formal event, or in a suit or some slacks I would wear/tolerate the underwear I had. But if I was in daily jeans or shorts I’d be free swinging. I tried various styles and fabrics and brands over the years. Always just throwing them out, until now. I then discovered Krakatoa and ordered a pair for every day of the week. My Krakatoa underwear are, without question, the only underwear I’ve enjoyed wearing on a daily basis in over 20 years. I’m a muscular 5’9” and 238 lbs. and have a 36” waste with 29” thighs. I wear the Vesuvius 1.5” in an XL and the Vesuvius 5” in an XL. And I genuinely can’t imagine wearing any other underwear again. Thanks for helping “my boys” find a home again.

  • LaDarius W.
    Verified Buyer
    Rated 5 out of 5 stars
    Love These!!

    Spacious pouch and love the color and fit!! I'm a small and I ordered a small, so true to size!!

  • Olivia
    Verified Reviewer
    Rated 5 out of 5 stars
    From a woman's perspective

    Not sure if women see these reviews or if men care, but I thought I'd share my thoughts. My husband bought the Vesuvius Sports Boxer briefs and I love them. He looks

    magnificent in the Caldera pouch. Incredible. I just bought him 4 more. Just love the way these briefs highlight his amazing masculinity. Ladies, get these for your man. You'll love him for it!

  • CJ
    Verified Buyer
    Rated 5 out of 5 stars
    Massive improvement

    The 5'' length was a massive improvement over the traditional 7'' length. I liked both options, but these shorter ones fit better when wearing shorts without showing. Similar in feel and style but without the worry of them showing. Fully mobile and supportive, these boxers are the real deal for any activity. Plus they just feel amazing.

  • Barry R.
    Verified Buyer
    Rated 5 out of 5 stars
    Best underwear hands down

    I have tried multiple brands of ball hammock, pouch underwear. Best to worst is Shinety, Hane,Jockey and Tommy John. They all have their own issues. Krakatoa are by far the best of the best. Total hands free no touch. Just pull up and ur junk falls right in. No lifting, touching, arranging or falling out. Bending, sitting, squatting or stooping they r still in there. I I thought the price for Krakatoa was expensive until I tried my first pair. They r worth every penny. My first pair was bought in Aug. 2025 was 5” leg, second pair Aug. 2025 was briefs was not a fan of the briefs and I was a tidy Whites for 65 years till I tried a 5” leg. It is September 2025 and I just received 6 more pairs of the 5” leg.😄 They WILL replace all my underwear.

  • JESSE M.
    Verified Buyer
    Rated 5 out of 5 stars
    So comfortable and cooling

    Okay, the 1st pair I got from Krakatoa was a Lg 7" Vesuvius, mostly because I'm a bigger guy, on the sizing bubble, so I erred on the side of caution. But, I wanted to try the 5" in medium too. So, I got 2 larges and three mediums. all in the Sports Boxer, 5". I've decided I like the Large 7"ers better, just because - for me - it provides more every-day comfort. There's no specific reason and NO downside to the others, I just like the extra material the 7" gives - preference only. I do feel more free in the large size, if you understand, for me. BUT, the mediums give so much support that they feel like workout/work gear and are so comfortable for that fit too. I ALSO like those, for that purpose. So, expect an order shortly for more large Vesuvius briefs to add to the stable.

    To those still on the fence about the style, design, construction, and price - you are screwing yourselves if you don't get a pair to try - at least 1. The fit, comfort, material, and cut of these boxer briefs will win you over, if you just give it a try. Those "pouch-type" boxer brief was where I came from and will say, unequivocably, that the Krakatoas are way better. EVERY male deserves to pamper themselves too, not just the girls. These take care of you in a way nobody else sees or knows, WITH HIDDEN COMFORT!!!

  • Amy R.
    Verified Buyer
    Rated 5 out of 5 stars
    Amazing!

    My husband loves these. We live in Florida and he golfs all the time in the summer. First pair he’s found that actually keep the boys separate from his thighs. He’s larger than average and also loves the pocket in front. Keeps things comfortable without having to arrange himself.

  • Priscilla M.
    Verified Buyer
    Rated 5 out of 5 stars
    The best so far

    My husband has been wearing underwear for 40+ years and he said these are the most comfortable underwear he’s ever had so far! Thank you for the great product. We will be buying more!

  • Vincent C.
    Verified Buyer
    Rated 5 out of 5 stars
    Best Underwear Ever

    Believe me I have purchased so many different brands of underwear and these are simply the best. I’ve purchased Uomo’s in Sicily, David Archy, Buck Naked, Etc. I also live in Florida with ridiculous heat. The micro modal fabric is like going commando. Don’t think about it another second just order these and trust me you will be happy you did.