Blue boxer briefs with text detailing features on a white background

Anti-Gravity Seamless Trunks

Imperial Blue / Waist 28"-30" (XS)
$46.00 CAD
$46.00 CAD $46.00 CAD
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Blue boxer briefs with text detailing features on a white background
  • Blue boxer briefs with text detailing features on a white background
  • White boxer briefs with a brand logo on a white background
  • Black boxer briefs with a patterned waistband on a white background
  • Black boxer briefs with a patterned waistband on a white background
  • Red boxer briefs with a black and gray waistband on a white background
  • Anti-Gravity Trunk Back View
  • Red underwear with a yellow tennis ball inside, black waistband with white text.
  • Video of Anti-Gravity's Pouch
  • Anti-Gravity Trunks overview video
Anti-Gravity Seamless Trunks

Anti-Gravity Seamless Trunks

4.8
Rated 4.8 out of 5 stars
79 Reviews
$46.00 CAD
$46.00 CAD $46.00 CAD
  • 1.5” Inseam
  • 3” Deep Double Lined Pouch
  • 95% MicroModal / 5% Elastane
  • Seamless Leg Hems
ColorImperial Blue
Size
3-Pack
$96.00 $81.60
Save $14.40
5-Pack
$160.00 $128.00
Save $32.00
7-Pack
$224.00 $168.00
Save $56.00

Savings are calculated for the current product being viewed.

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.
Mix match and save 3+ is 15%, 5+ is 20%, 7+ is 25%
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

1.5" Inseam

For those that like a brief but prefer a bit more coverage.

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:
Close-up of a blue fabric texture

FULL SUPPORT POUCH
All the Support, None of the Fuss.

Say goodbye to readjustments! Our large, 3" deep front pouch is engineered to separate you from your thighs and keep you comfortably supported all day.
No gimmicks, no side panels, no holes to go through every time you go to the bathroom.
It just works.

No fly? No problem! Just pull the waistband down and do your business.
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 79 reviews
Total 5 star reviews: 70 Total 4 star reviews: 4 Total 3 star reviews: 5 Total 2 star reviews: 0 Total 1 star reviews: 0
94%would recommend this product
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79 reviews
  • Anthony Y.
    Verified Buyer
    Rated 5 out of 5 stars
    Absolutely love these

    These were a last minute thing but I wanted to try them since the seam had changed and the inseam length changed and they were perfect. The old seam would occasionally roll up and be between my legs like briefs and would drive me crazy because I have thicker legs but the new seam doesn’t happen as often unless im moving a lot and if it does does not bother me because of how thin it is. These also really make everything pop a lot more and it’s a huge confidence boost.

    Thank you Alex

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  • Rick S.
    Verified Buyer
    Rated 5 out of 5 stars
    Love the fit, love the feel

    I also have a pair of the boxer briefs. Like the fit and feel of these better. Great support.

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  • Lawrence M.
    Verified Buyer
    Rated 5 out of 5 stars
    They Feel as Good as They Look

    This is the first time I’ve found underwear that feels the way underwear SHOULD feel: more comfortable than wearing nothing, and more comfortable than anything else. ALSO, I like the way this underwear makes me look: like I’ve got an enviable package. What a great feeling.

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  • Michael S.
    Verified Buyer
    Rated 5 out of 5 stars
    The BEST!

    I have been wearing Krakatoa for almost a year - since switching I have never gone back. I really love the new anti-gravity! They fit like a glove & feel super comfortable. I started on the OG anti gravity and still have a few - the new ones are no comparison!

    I highly recommend these underwear and Alex is an excellent business owner providing consistent customer support and constantly improving his brand & product! Way to go Krakatoa. Lifetime customer here!

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  • Dave T.
    Verified Buyer
    Rated 5 out of 5 stars
    I LOVE These trunks

    For years I used to wear the undies which had seems up the top of the leg.... and after sweating thru the day, I would sometimes get jock itch. And even after the jock itch went away, I didnt like that feeling of the seem. When I saw the ad for these Anti-Gravity Seemless Trunks, I was a bit skeptical.... how good could undies feel. AND I purchased four of them. I love love them. They feel good on my skin, and are so comfortable. Im ready to place an order for more, and throw away all my old ones.

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  • Vincent B.
    Verified Buyer
    Rated 5 out of 5 stars
    Unmatched Comfort and Perfect Fit!

    The new Krakatoa Anti-Gravity Seamless Trunks are a game-changer. The seamless design delivers all-day comfort without any irritation, and they truly live up to the promise of feeling weightless. The fit is spot-on—true to size and perfectly supportive without being restrictive. Whether it’s a long workday or lounging at home, these trunks keep me comfortable and confident. Krakatoa has nailed it with this design.

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  • John W.
    Verified Buyer
    Rated 5 out of 5 stars
    Great for the gym!

    Perfect for working. Fabric is super soft!

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  • Rich
    Verified Buyer
    Rated 5 out of 5 stars
    AMAZING!

    So I decided to give these a try. I have short legs and trunks look better on me. What I was not expecting is how "not there" these trunks are. They are so soft and comfortable and the waistband is a perfect fit. But you wanna what's the best part? The pouch. I got the 3" and wow. Awesome support and framing!

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  • Scott
    Verified Buyer
    Rated 3 out of 5 stars
    Not seamless.

    I bought them during the 50% off first-pair promotion. When they arrived, they felt a bit small, so I checked the sizing chart. I have a 34” waist, which falls within the medium range. I wanted to exchange them for a large, but they don’t allow exchanges—only store credit toward another pair.

    I’m also not entirely sure what they mean by “seamless,” because my pair has two seams that are somewhat uncomfortable. They’re sewn over the material and tend to cause irritation

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  • DAVID P.
    Verified Buyer
    Rated 5 out of 5 stars
    love!

    Great fit, great value! I will be buying more!

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