PInatubo Seamless Boxer Brief in Jet Black - Front

Pinatubo Boxer Briefs - 5"

Jet Black / Waist 28"-30" (XS)

$ 34.00 USD

$ 34.00 USD $ 34.00 USD

Pinatubo Boxer Briefs - 5"

4.8

Rated 4.8 out of 5 stars

647 Reviews

$ 34.00 USD

$ 34.00 USD $ 34.00 USD

BUY MORE SAVE MORE SAVE UP TO 28%

Offer	Per Unit
Single Unit	$ 34.00 / ea
Buy 3, Get 1 FREE SAVE 25%	$ 25.50 / ea
Buy 5, Get 2 FREE BEST VALUE	$ 24.29 / ea

5” Inseam
Horizontal Fly
3” Deep Double Lined Pouch
95% MicroModal / 5% Elastane
Seamless Leg Hems

Color Jet Black

Size Waist 28"-30" (XS) Waist 31"-33" (S) Waist 34"-37" (M) Waist 38"-40" (L) Waist 41"-44" (XL) Waist 45"-48" (XXL)

Smart Size Recommender

Imperial (ft / in / lbs) Metric (cm / kg)

Height

Height (cm)

Weight (lbs)

Something not look right?

Email us at hello@krakatoaunderwear.com.

🛡️ Krakatoa First Pair Guarantee

Wrong fit on your first pair? No returns needed.

We’ll credit you the full retail value toward a new size—just cover shipping.

Or View Flat Measurement Chart ▼

How to measure: Lay your best-fitting underwear flat on a surface and measure the waist band width, then double it. Match your measurement to the highlighted Primary Match column. If in-between, size up.

Size	Listed Waist	Primary Match No Stretch	Normal Stretch	Max Stretch
XS	28–30 in	25 in	29 in	31 in
S	31–33 in	27 in	32 in	34 in
M	34–37 in	29 in	35 in	38 in
L	38–40 in	32 in	39 in	41 in
XL	41–44 in	35 in	42 in	45 in
XXL	45–48 in	38 in	46 in	49 in

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Krakatoa First Pair Guarantee
Wrong fit on your first pair? No returns needed.
We’ll credit you the full retail value toward a new size - just cover shipping.

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.

Midrise
Form-fitting

1st Fit Guarantee

Krakatoa First Pair Guarantee
Wrong fit on your first pair? No returns needed.
We’ll credit you the full retail value toward a new size - just cover shipping.

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

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.

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.

95% MicroModal 5% Elastane

Care Instructions

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

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.

OUR PROMISE TO YOU

Krakatoa First Pair Guarantee

Wrong fit on your first pair?
No returns needed.
We’ll credit you the full retail value toward a new size - just cover shipping.

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Smart Size Recommender

Imperial (ft / in / lbs) Metric (cm / kg)

Something not look right?

Email us at hello@krakatoaunderwear.com.

🛡️ Krakatoa First Pair Guarantee

Wrong fit on your first pair? No returns needed.

We’ll credit you the full retail value toward a new size—just cover shipping.

Or View Flat Measurement Chart ▼

How to measure: Lay your best-fitting underwear flat on a surface and measure the waist band width, then double it. Match your measurement to the highlighted Primary Match column. If in-between, size up.

Size	Listed Waist	Primary Match No Stretch	Normal Stretch	Max Stretch
XS	28–30 in	25 in	29 in	31 in
S	31–33 in	27 in	32 in	34 in
M	34–37 in	29 in	35 in	38 in
L	38–40 in	32 in	39 in	41 in
XL	41–44 in	35 in	42 in	45 in
XXL	45–48 in	38 in	46 in	49 in

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 use.

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.

UNFLIPPABLE WAISTBAND
The Art of Comfort

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.

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 647 reviews

96%would recommend this product

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647 reviews

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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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Andy V.
Verified Buyer
What is your height? 6' 0"
What is your body type? Normal

What is your height? 6' 0"
What is your body type? Normal
Rated 5 out of 5 stars
Think I found my favorite
I recently bought several pairs of underwear. Krakatoa, Manmade, Step one and All citizens. After trying each, I’ve chosen Krakatoa. I love the pouch area and the waistband.
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Timothy L.
Verified Buyer
What is your height? 5' 11"
What is your body type? Normal

What is your height? 5' 11"
What is your body type? Normal
Rated 5 out of 5 stars
Too good to be true….
…or not! That stuff about forgetting you’re wearing them and not needing to readjust? Well it’s actually true. I bought a few pairs and after wearing them a few days, logged right back on and bought 5 more pairs. Time to throw out the stretched out and passé Shinesty.
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Mike M.
Verified Buyer
What is your height? 5' 8"
What is your body type? Normal

What is your height? 5' 8"
What is your body type? Normal
Rated 5 out of 5 stars
Gotta be KRAKATOA!!!
I have finally filled my drawer with all Krakatoa. And these are the best undies around.
Comfortable, breathable, they dont ride up or slip down and they keep everything in their own place.
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Robert B.
Verified Buyer
What is your height? 6' 0"
What is your body type? Round

What is your height? 6' 0"
What is your body type? Round
Rated 5 out of 5 stars
BEST DESIGN FOR TOTAL COMFORT AND SUPPORT HANDS DOWN!
I’ve had all kinds of expensive boxers. Purchased these and NEVER LOOKED BACK! I plan on buying more! These are THE BEST IN THE BUSINESS!
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Nick N.
Verified Buyer
What is your height? 6' 0"
What is your body type? Built

What is your height? 6' 0"
What is your body type? Built
Rated 5 out of 5 stars
Best Ive Tried
Best feeling underwear i have had. We they tell you you'll forget you're wearing them. Believe it
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