Red boxer briefs with a patterned waistband on a white background

Pinatubo Boxer Briefs - 5"

Lava Red / Waist 28"-30" (XS)
$ 34.00 USD
$ 34.00 USD $ 34.00 USD
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Red boxer briefs with a patterned waistband on a white background
  • Red boxer briefs with a patterned waistband on a white background
  • White boxer briefs with a patterned waistband on a white background
  • Blue boxer briefs with a brand logo on a white background
  • PInatubo Seamless Boxer Brief in Jet Black - Front
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  • Pinatubo Sports Boxer Back View
  • Pinatubo Sports Boxer inside-out showing front view
  • Pinatubo Boxer Brief inside-out showing pouch
  • Pinatubo Boxer Brief inside-out showing printed washing label
  • Pinatubo Boxer Brief inside-out showing seamless hems
  • Yellow tennis ball in a white pocket with text overlay on a gray background
  • Video showing pinatubo's pouch
Pinatubo Boxer Briefs - 5"

Pinatubo Boxer Briefs - 5"

4.8
Rated 4.8 out of 5 stars
559 Reviews
$ 34.00 USD
$ 34.00 USD $ 34.00 USD
Save 20% when you buy 5+ items
  • 5” Inseam
  • Horizontal Fly
  • 3” Deep Double Lined Pouch
  • 95% MicroModal / 5% Elastane
  • Seamless Leg Hems
ColorLava Red
Size

Free Ground Shipping on Orders over $150

We do our best to process orders within 1-2 business days. Please keep in mind that over busy times this might take longer.
Fit
  • Midrise
  • Form-fitting
First Fit Guarantee

1st Fit Guarantee

We want you to find the perfect fit.

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

If you bought multiple pairs, make sure you try ONLY ONE PAIR for fitting purposes.

NOT ONE PER STYLE OR LINE.

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.
1 Year Warranty

1 Year Warranty

We want you to feel confident making your purchase from us. We provide a 1 Year Warranty from the date of purchase. If your item has any structural damage resulting from a manufacturer's defect from 1 year of purchase, 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 "1 Year Warranty Claim". Please be sure to include photos of the damage for our records.

We will be in touch shortly after.

Full details can be found HERE.
Specs & Features

5" Inseam

Mid-length inseam that works well under running shorts and great for guys less than 5'10" or shorter legs.

Horizontal Fly

Easy access horizontal fly that makes it a breeze to access your parts.

3" Deep Pouch

3" deep pouch that provides plenty of room and support.

95% MicroModal / 5% Elastane

The perfect blend of soft, yet structured to ensure that it maintains shape all day and doesn't stretch out.

Lay Flat Waistband

1.5" wide lay flat waistband that will not roll, bunch, or pinch.

Seamless Hems

Hems designed to stay tight all day and not loosen as the day goes on from movement. No one likes legs that ride up.
Materials & Care Instructions

95% MicroModal 5% Elastane

Care Instructions

Machine Wash Cold, Gentle Cycle, Do Not Bleach, Tumble Dry Low, Do Not Iron
Returns and Exchanges

Returns & Exchanges

We except returns on all unopened and sealed products within 60 days from purchase.

ALL INTRO PAIR ORDERS ARE FINAL. NO RETURNS OR EXCHANGES.

WHAT SETS US APART

Every little detail was obsessively fine-tuned, to deliver you an underwear experience like no other:
Up close of Pinatubo underwear Fly in purple.

FULL SUPPORT WITH A FLY
Putting the Fun in Functional

Pinatubo’s 3” deep pouch design with minimal stitching keeps you comfortable and secure all day.
The one-handed, top-access horizontal fly provides effortless reach into the goods.
The low-stitching 3" pouch is ultra-smooth, without holes, panels or gimmicks.
It just works.
It separates you from your thighs, ensuring comfortable support through all of life’s adventures.
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 Tencel 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.
Close up of seamless hems

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.
4.8
Rated 4.8 out of 5 stars
Based on 559 reviews
Total 5 star reviews: 496 Total 4 star reviews: 42 Total 3 star reviews: 12 Total 2 star reviews: 6 Total 1 star reviews: 3
96%would recommend this product
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559 reviews
  • Jay R.
    Verified Buyer
    Rated 5 out of 5 stars
    So comfortable

    These are my favorite color and style of underwear wear . Will never wear another .

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  • Michael D.
    Verified Buyer
    Rated 5 out of 5 stars
    No roll waistband and amazing comfort!

    I love these underwear!! They are incredibly soft and comfortable and not binding even though I've put on a few pounds since I started wearing them. But, the greatest thing about these underwear is that the waistband does not roll over AND it's still comfortable, my stomach roll doesn't roll it down. This was what I was looking for! I just ordered 4 more pair. I can't wait until my whole underwear drawer is filled with Pinatubo from Krakatowa. Thanks for creating an amazingly comfortable garment.

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  • Kurt R.
    Verified Buyer
    Rated 5 out of 5 stars
    I Love Pinatubo Style!

    With all of the Krakatoa underwear that I have bought, I’ve learned that Pinatubo is the best style for me! Absolutely LOVE every Pinatubo model I have purchased! From the trunks, to the thongs and the others in between, Pinatubo are the BEST! The comfort of the material is so soft! The size of the pouch is perfect for me! The horizontal fly is the easiest access when needed! I have exclusively changed my underwear drawer to Krakatoa!!! Nothing else compares to these underwear, NOTHING!

    Thanks for creating such a wonderful product!

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  • Dan M.
    Verified Buyer
    Rated 5 out of 5 stars
    Best underwear in my 60+ years on this planet!

    The fabric is amazing. It is soft, movable and breathable the fit once I asked for help with your sizes you helped me out right away and it is probably one of the best fits I’ve ever had now for the features. The ball pouch works like no other and believe me I have the ones with the flaps. I have the ones with other features. Nothing works like this. I am very glad I got these. They are in heavy rotation and as soon as I can afford some more. I will get some more thanks!

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  • Corey B.
    Verified Buyer
    Rated 5 out of 5 stars
    Luxurious comfort... superb support!

    I can't rave enough about these Pinatubo seamless sports boxers! I've been pretty dedicated to either Under Armour or Tommy Johns for several years, but got so frustrated at how the sizes never stayed consistent, nor the same fit. But these (3rd ordered now...) have the best balance of comfort & support I've ever worn! The material is luxurious and sexy - maybe little too much, as I'm aroused a bit every time I think about how perfect the boys are nestled in place. The fly is THE perfect design for many reasons 😉

    Keep up the good work guys!

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  • Roy M.
    Verified Buyer
    Rated 5 out of 5 stars
    All-Around Winners

    These boxer briefs were everything I'd hoped for and more: soft and luxurious, so comfortable they felt almost nonexistent, reasonably priced, and nice-looking as well. For years I've been on an informal quest to find, if not the ultimate underwear, then at least some that I can reach for with confidence when I open my underwear drawer (my drawers drawer?). I'll try almost any new brand I run across, unless it's outrageously priced. The best ones I buy again and again, until another brand catches my attention. These boxer briefs - my style of choice these days - are a worthy addition to my collection.

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  • JEFFREY W.
    Verified Buyer
    Rated 5 out of 5 stars
    HIGHLY recommended!!!

    I was looking for something more comfortable and supportive than standard boxers that I have worn for years. Originally, I went with a different company that boasted a different type of pocket, that was certainly not “paradise” for me. So I gave Krakatoa a try and ordered 1 pair. MAGNIFICENT!! I then ordered 3 more pairs, and then 3 more!!! Amazingly comfortable and my boys sit the way they should!! I can’t recommend them enough!!! If I could give 50 stars, I would!

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  • Markus D.
    Verified Buyer
    Rated 5 out of 5 stars
    Best underwear?

    I’ve been on a micro modal underwear search for a while now. Out of all of the brands I’ve tried, the fit is the best overall. The fabric is also unlike any micro modal any other brand makes. I originally ordered the Pinatubo as the Anti Gravity were out of stock at the time. The fly isn’t a deal breaker but I do prefer my boxer briefs without. Now the Anti Gravity are basically perfection due to not having the fly.

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  • Jorge R.
    Verified Buyer
    Rated 5 out of 5 stars
    These are the absolute best!

    I have several pairs now, and will only buy this brand in the future. I’ve tried them all, Sheath, Tommy John, under Armour , CK, Mack Weldon, you name it, I saved these for last - initially because they are on the pricier end, but after trying a pair I can see where that extra cost is earned. They are perfect in every way, they keep the goods in place, they breathe well (this is a must in TX!), they don’t ride up and the waistband doesn’t fold(these are the FIRST pair that have ever stayed put when it comes to the waistband - not sure how they figured that out, but it works!).

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  • Douglas L.
    Verified Buyer
    Rated 5 out of 5 stars
    Best underwear I’ve found

    I have been searching for the perfect pair of underwear for about 3 years now. I’ve tried all the major brands and some obscure ones that only advertise on Instagram. Nothing seem to meet my needs. I can safely say “My search is over!” They are super breathable, comfortable, and hold the boys just right. I tried one pair because I was skeptical and thought these too would be a bust. Wore on and off for about a month and then I bought 5 more pairs. These are my go to underwear for every activity. Whether it be lounging on the couch or running in the 110 degree Phoenix, AZ heat. They hold up no matter the activity. I can’t wait to see what Krakatoa come up with in the future!

    Thank you,

    Life long new customer,

    Doug

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