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Year of the Snake - Shop Now
Men's Trunk / Totally Hyper Men's Trunk / Totally Hyper Men's Trunk / Totally Hyper Men's Trunk / Totally Hyper Men's Trunk / Totally Hyper Men's Trunk / Totally Hyper
4.9
Rated 4.9 out of 5 stars
3,514 Reviews

Totally Hyper Men's Trunk

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  • Star IconColour changes with your body heat!
  • Star Icon The ultimate 90s throwback.
  • Star Icon This best-selling style is the perfect all-rounder!

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CONGRATULATIONS! SAVE 15%

Knobby Undie Club members save 15% on most products. Discount will automatically be applied once the item is added to your bag. To add another subscription, head over to your member portal.

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Notify Me When Available

Same day dispatch if you order before 1pm AEST

Break out your boombox, rewind your mix tape, and strap on your skates because Totally Hyper serves some big Nostalgic energy. The ultimate 90s throwback, this design has neon in all the right places and a heat-activated colour-changing lighting bolt on every pair for the ultimate power in your pants.
  • Ultra soft pin-hole BottleBlend® fabric
  • Made from up to five plastic bottles
  • Sanitized® bacteria and odour control
  • 4cm band with plush inner microfleece
  • Lightweight 160 gsm for versatility and comfort
  • 88% Recycled Poly
  • 12% Spandex
  • Tagless with printed care label
  • Made ethically and sustainably in China
  • THE STYLE: This best-selling style is the perfect all-rounder! Created from BottleBlend®, our very own recycled material, containing up to five plastic bottles. Flatlock seams for comfort and an inseam length of 15cm to reduce ride-up and eliminate cheeky chafe.
  • THE FIT: Each of our undies are made to a global standard. They are true-to-size, so order whatever size you would typically order for shorts. See our size guide.
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Each pair of Knobbys will arrive in a custom designed, certified kraft paper package or a sealed paper pouch and postage bag made with cornstarch, which is 100% compostable!

All our Australian printed papers and cardboards are recyclable, FSC certified and made carbon neutral, because we give a shit.

Our mission is to be the most sustainable underwear brand in the world.

FREE Standard Domestic Shipping for orders over $100

$9.50 Standard Domestic Shipping for orders under $100

Order before 1pm AEST on weekdays and we'll dispatch the same day!

Returns

Get in touch with our Support Ninjas within 30 days of receiving your Knobbys if you'd like to organise an exchange, refund, coupon or credit! More details

Men's Trunk / Totally Hyper
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Customer Feedback

4.9
Rated 4.9 out of 5 stars
Based on 3,514 reviews
Total 5 star reviews: 3.3k Total 4 star reviews: 172 Total 3 star reviews: 15 Total 2 star reviews: 8 Total 1 star reviews: 10
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3,514 reviews
  • Brittany W.
    Verified Buyer
    Rated 5 out of 5 stars
    1/6/25
    Topping the Christmas wish list!

    Got the sunshine ranch gift pack for me and my partner. Incredible design! We love it immensely. Always the first pick from the undie draw.

  • Sall S.
    Verified Buyer
    Rated 5 out of 5 stars
    1/5/25
    Magic

    Grandson’s favourite pair. Stretch well ,so great for the pool . Soft and well made.. He loves the fact they light up. All his favourite ones are the luminous designs.

  • Stephen S.
    Verified Buyer
    Rated 5 out of 5 stars
    1/2/25
    Best trunks on the market

    Mate, these Knobby trunks are the All Blacks of undies – absolute legends on the field (or, in this case, your backside). I grabbed these as a Christmas pressie, and let me tell ya, they’re the gift that keeps on giving.

    First off, the fit is so good it’s like they were custom-made by a bloke who knows the exact dimensions of your bum. They hug you in all the right places without riding up like a rogue sheep on the run. Honestly, it’s like wearing a cloud, if clouds were stylish, breathable, and didn’t make you look like a muppet.

    Durability? These bad boys could survive a full-on haka. Whether you’re smashing a workout, chasing the kids, or just lounging around watching the cricket, they stay comfy and keep their shape. No saggy bum here, bro.

    I’m already planning to stock up on more – because let’s be honest, once you’ve gone Knobby, there’s no going back. They’re the Richie McCaw of undies: reliable, top-notch, and always performing at their peak.

    10/10, I would recommend. If you’re still wearing those sad, stretched-out undies from 2015, do yourself a favour and upgrade. Your bum deserves better. Kia kaha, Knobby! 🩲

  • Stu G.
    Verified Buyer
    Rated 5 out of 5 stars
    12/30/24
    Awesome Xmas trunks!

    Great colours and fun images - love the Xmas scrapping haha. They’re super comfortable and my favourite pair of Knobby so far!

  • Harley W.
    Verified Buyer
    Rated 5 out of 5 stars
    12/29/24
    Love them.

    I like the colours. They are comfy. I had my doubts buying from. You guys thought it was going to be cheap and nasty. I'm glad I was wrong.

    Looking forward to buying more products from you guys.

  • Cory M.
    Verified Buyer
    Rated 5 out of 5 stars
    12/26/24
    Best men’s boxes in the world

    Absolutely love knobby will not buy anything else now awesome designs and well designed super comfortable would recommend to anyone

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