Skip to product information
1 of 12

Pinatubo Boxer Briefs

Pinatubo Boxer Briefs

4.9
Rated 4.9 out of 5 stars
1,727 Reviews
Regular price $ 34.00 USD
Regular price $ 28.00 USD Sale price $ 34.00 USD
Sale Sold out

Horizontal Fly, 95% MicroModal, Stay Flat Waistband, 7" inseam


Size Guide
Size
Color

Save with Bundle Pricing

Save 10% when you buy 3+ pairs.
Save 20% when you buy 7+ pairs.

Mix and match items to unlock savings.
Savings automatically added to your cart.

📦 Orders ship within 1-2 business days

The Details

The Easy-Access Boxer Brief

Pinatubo’s top-access horizontal fly offers a quick-draw, one-handed action, making it easy to reach in and go—putting the ‘fun’ back in functional.
The large, 3-inch deep front pouch, with minimal stitching, is designed to keep you separated from your thighs and comfortably supported all day long.

Form-fitting ultra-premium MicroModal fabric holds you softly and leaves you feeling fresh and cool.

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

Legs that don't roll up or bunch up.

Inseam: 7 inches

52 Wash Guarantee. Because we can.

1st Order Fit Guarantee

Our number one goal is that you're happy with your purchase.

If something doesn't fit right on your regular priced Krakatoa, let us know and we will work with you to make it right.

They are usually a bit more snug when brand-new, so give it a wear and a wash to reach their final shape.

If you purchase multiple pairs, make sure you ONLY TRY ON ONE PAIR and make sure it's perfect on you.

Beyond the first pair, all underwear must be unworn, unwashed, in the original condition and packaging that you received them for an exchange or refund.

52 Wash Guarantee

We've built a tough product with advanced stitching, and the very best materials we could get our hands on.

That said, you should follow the care instructions: wash it cold and dry in medium temperatures with similar soft fabrics, for best results and durability.

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 before 52 washes or 12 months, we'll replace them for just the cost of shipping.

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.

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.

THE FINEST MICROMODAL FABRIC
Exceptional Softness and Breathability.

Say goodbye to readjustments!
Our large 3" pouch design with minimal stitching ensures you stay comfortable and secure all day.

The one-handed easy-to-use horizontal fly allows for easy access.

It separates you from your thighs and keeps you comfortably supported in all of life's adventures.

SOFT STITCH HEMS
For Legs That Stay Put.

Our boxer briefs are perfect for active guys that prefer a longer leg to fit under their pants or long shorts. They are ideal for daily wear, hiking and protecting the inner thighs from chafing.

The legs are cut to be tailored but not compression. The bottom hems are stitched to stay in place, the longer legs allow for the legs to stay put and not ride up over the quad. 

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.

HEY ALEX, I HAVE QUESTIONS!

What should I know about the fit?

The Pinatubo Boxer Brief is designed with a 7" inseam.
The legs are designed to stay put, but be long enough to cover an increased amount of your legs to add a layer of protection from friction.
The pouch is designed to be large enough to provide you room, while being double layered to also provide support and privacy for your privates.
The Horizontal Fly allows for super easy access.
All of this is benefited by our use of MicroModal which is incredibly lightweight and breathable.

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 pouch is 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?

Our number one goal is that you're happy with your purchase.

If something doesn't fit right on your regular priced Krakatoa, let us know and we will make it right.

Try on a pair and make sure it's perfect in you. If it doesn't work for you, your first regular priced pair is covered.

After this first pair, all underwear must be unworn, unwashed, in the original condition and packaging that you received them for a refund.
If you bought multiple pairs, make sure you try ONLY ONE PAIR for fitting before you decide to use the rest.

INTRO PAIRS ARE FINAL SALE AND NOT RETURNABLE.

How do I wash my Krakatoa?

Krakatoa is quite resistant to shrinking and fading, but machine-washing them in cold or medium temperature water, 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've built a tough product with reinforced stitching that lays flat and the very best materials we could get our hands on.

That said, you should follow the care instructions.

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 before 52 washes or 12 months, we'll replace them for just the cost of shipping.

WHICH BOXER BRIEF 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:

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 1,727 reviews
Total 5 star reviews: 1.6k Total 4 star reviews: 103 Total 3 star reviews: 16 Total 2 star reviews: 6 Total 1 star reviews: 4
91%would recommend these products
Customer-uploaded media carousel. Press left and right arrows to navigate. Press space or enter to open more details.
Slide 1 selected
1,727 reviews
  • Ryan
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    5 Stars

    The greatest underwear ever made!!!

  • Thomas G.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    Repeat buyer

    Excellent product! I tried three different brands before choosing Krakatoa as my go-to underwear. I am a bit chubby around the waist, and minimizing wetness from sweat is essential. I do not think any underwear can eliminate this problem; Krakatoa is the best I have tried.

  • Cameron H.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    Very Comfortable

    Terrific fabric; also really like the vertical fly. Pouch fits better than the AntiGravity Boxer Briefs. Nice job! Thanks.

  • LARRY N.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    Six stars

    I’d give you six stars if I could best damn Underware I’ve ever had and I’ve tried a lot the boys are happy

  • P J M.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    Best ever!

    Great underwear! I love them. Comfortable, fit perfectly, great waistband. I'll be ordering more!

  • Matthew R.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    Great underwear

    Love these boxer briefs. The fabric is incredibly soft. And controls temperature well. The "pocket" fits as advertised. The briefs style is form fitting without being too tight or restrictive. The waistband stretches and fits well without rolling over on itself or becoming uncomfortable. Durability seems good. Will revise the review if otherwise.

  • Daniel P.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    sporty and comfortable

    Got these to wear during BJJ training, comfortable and smooth. Thank you for making such a great product.

  • Mark G.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    The perfect fit.

    Amazing ! Extremely impressed with the quality. The fabric is extremely soft. Will definitely be buying some more soon. Thanks again

  • Al D.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    Amazing comfort!

    I am so comfortable I can’t stand it! The waist band and the soft material make it feel like I’m flying “commando” but the underwater so supportive and I live the correctly-placed fly! I ordered from a competitor before with the initials TJ and these are worth every penny. I am a customer for life!!

  • Peter M.
    Verified Buyer
    Pinatubo Boxer Briefs
    Reviewing
    Pinatubo Boxer Briefs
    Rated 5 out of 5 stars
    Awesome fit and feel

    I am so glad I found these krakatoa products. The fit and feel are amazing, almost like wearing nothing. The waistband stays put as advertised and the pouch provides excellent support. Will be ordering more and replacing all of my old underwear

Reviews LoadedReviews Added