Skip to product information
1 of 9

Vesuvius Sports Boxer

Vesuvius Sports Boxer

4.9
Rated 4.9 out of 5 stars
248 Reviews
Regular price $ 36.00 USD
Regular price $ 36.00 USD Sale price $ 36.00 USD
Sale Sold out

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

Size
Color
Bundle Savings

📦 Orders ship within 1-2 business days

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 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

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, 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 248 reviews
Total 5 star reviews: 230 Total 4 star reviews: 16 Total 3 star reviews: 1 Total 2 star reviews: 1 Total 1 star reviews: 0
99%would recommend this product
Slide 1 selected
248 reviews
  • 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!

  • Matthew C.
    Verified Buyer
    Rated 5 out of 5 stars
    Great undies, better company.

    First and foremost it took a few tries, but I found a size and fit that was right for me. Yes, they are more expensive than other options out there, but you aren't just paying for underwear. They went above and beyond to ensure I was satisfied. I'm on the taller side, with a smaller waist and I guess a bigger butt and the sizing took a few tries. As they helped me with this process I could tell the passion they have to make people happy and I'm more than willing to pay a few extra dollars to good people who run an honest company. I will be buying more in the future.

  • Jason T.
    Verified Buyer
    Rated 5 out of 5 stars
    I’m an underwear snob

    So I searched for years for the perfect underwear. I found others I thought were comfortable but the fabric between my thighs would disintegrate in a matter of weeks or months. (Big names and expensive pairs) Others would last much longer but they were uncomfortable and would bunch up. Krakatoa has it 100% dialed. I like the big pouch because it lets my junk have space and keeps it off of my legs but with basketball shorts it can be obscene. The smaller pockets are better for those moments. I am a boxer brief man so I cannot speak to other styles but the boxer briefs from Krakatoa set the bar for top tier underwear.

  • George S.
    Verified Buyer
    Rated 5 out of 5 stars
    Fantastic!

    This was my first pair of Krakatoa and I'm very impressed. I've tried several other premium brands, but none are better than this. And - not only is the underwear fantastic, but the weekly newsletter from Alex is excellent. Most companies send crap that I unsubscribe to immediately, but honestly I look forward to the weekly Krakatoa newsletter!

  • Armando D.
    Verified Buyer
    Rated 5 out of 5 stars
    Because Men Deserve Great Underwear too.

    Whole industries rise and fall in womens undergarments. But not men. We get hanes, or some wierd stuff designed for men who run marathons. I'm not a pro athlete, I just want a pair of underwear that doesn't make my boys drown in their own juices but also makes my wife say....."hello there". Enter Krakatoa and Alex, the small business who apparently has solved the elusive underwear problem that has plagued companies of gargantuan size. Worth every penny, and amazing features that should be standard in all underwear like: 1) Don't ride up. 2) Don't squeeze the boa. 3) Fly done correctly. 4) Wide band means no fat roll. I could go on. But do yourself a favor and just get a pair. Its worth it.

  • Taylor N.
    Verified Buyer
    Rated 5 out of 5 stars
    The king of boxer briefs!

    It’s crazy that men’s underwear has existed for so long without ever truly accommodating for the male anatomy or really any level of comfort and support. I’ve owned several pairs of other boxer briefs that only tiptoe in concept toward what Krakatoa accomplishes with the pouch, both supporting the boys and eliminating the sweaty discomfort that seems to never go away with other brands. And the StealthFly is the cherry on top. Takes a bit of getting used to - I still sometimes forget it’s there! - but it’s certainly a neat and useful feature. Just try them, you absolutely will not regret it.

  • Robert A.
    Verified Buyer
    Rated 5 out of 5 stars
    I’m recommending to coworkers

    I work in the restaurant business and walk 5 to 10 miles a day. Summer is especially brutal for sticking and chafing. Not so with these bad boys. I’m ignoring the awkwardness and have wholeheartedly recommended them to my colleagues and have hinted to my partner that I have a birthday coming up.

  • Gary M.
    Verified Buyer
    Rated 5 out of 5 stars
    Vesuvius blows the top off horizontal fly underwear!

    I have been an adamant fan of horizontal fly underwear for years. I own maybe 6 different brands. I thought the horizontal fly was as good as it was ever going to be. And then, I wore Vesuvius! The fly is better and improved! They inverted the opening. Now, the top flap sits over the bottom flap. You reach up into it, rather than down to extract your man part. Simple yet ingenious innovation. And the feel is like second skin. It moves the way you do. The fabric is silky soft. These are my new best boxer briefs with horizontal fly!

  • Samantha V.
    Verified Buyer
    Rated 5 out of 5 stars
    My husband says it's like he isn't wearing anything and he LOVES it!

    These Sport Boxers are all that they claim and more! My husband doesn't get too worked up over much but he's been raving about these for days! He's always on the go, long hours in the truck and even longer hours working outside, around the ranch. He's the perfect test subject because he's hard to impress and tests the limits of every article of clothing I've ever bought him! Krakatoa has exceeded expectations and now I'd better go place another order before my husband realizes I only bought him two pairs! lol