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Men's Trunk / Merino Wild Fire Men's Trunk / Merino Wild Fire Men's Trunk / Merino Wild Fire Men's Trunk / Merino Wild Fire Men's Trunk / Merino Wild Fire Men's Trunk / Merino Wild Fire
4.9
Rated 4.9 out of 5 stars
23 Reviews

Merino Wild Fire Men's Trunk

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  • Star Icon94% Australian Merino Wool
  • Star Icon 6% Elastane
  • Star Icon Lightweight 155 gsm

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Same day dispatch if you order before 1pm AEST

Natural. Ethical. Sustainable.

Made from superfine 94% Merino Wool fibres grown in the foothills of the Great Dividing Range in Victoria, Australia. From country air to underwear, it’s cut, sewn and transformed into this pair at our Melbourne factory, then packaged and sent to you from our Sunshine Coast warehouse.

Merino wool reacts to changes in body temperature and helps you stay warm when the weather is cold and cool when it’s hot.

Created to support the Australian textile industry, it has been certified to carry the iconic Australian Made and Owned logo.
  • 94% Australian Merino Wool
  • 6% Elastane
  • Lightweight 155 gsm
  • Superfine Merino - 18.9 Microns
  • Woolmark certified
  • Australian Made certified
  • Naturally antibacterial
  • Satin care label
  • 4cm waistband with plush inner microfleece
  • Made in Melbourne, Australia
  • Packaged in a collectors edition tin box
  • THE STYLE: This best-selling style is the perfect all-rounder! Improved with a contoured pouch and flatlock seams for comfort. An inseam length of 15cm to reduce ride-up and eliminate cheeky chafe.

    The stretch of Merino Wool is greater than BottleBlend and Bamboo, so you may need to go down a size from your current Knobby sizing. Refer to our size guide or chat with the support team.
  • THE FIT: Each of our products is crafted to meet global standards and follows true-to-size measurements. Please refer to our size guide.for more details.
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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 / Merino Wild Fire
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Customer Feedback

4.9
Rated 4.9 out of 5 stars
Based on 23 reviews
Total 5 star reviews: 21 Total 4 star reviews: 2 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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23 reviews
  • Mark R.
    Verified Buyer
    Rated 5 out of 5 stars
    9/23/24
    Pretty good

    Comes in a cool case. Pretty good overall, haven't used long enough to compare to the others.

  • Rob R.
    Verified Buyer
    Rated 5 out of 5 stars
    1/11/25
    So flipping comfortable!

    Not only are these the 2nd coolest design Knobby has ever released, but they are the comfiest things I’ve ever worn. They break in nicely after that first wash and if they’re anything like the regulars, they’re gonna last me forever. I wish I had one of these for each day of the week!

  • Ian C.
    Verified Buyer
    Rated 5 out of 5 stars
    1/5/25
    Wildfire Trunk

    Would have been very nice but they were returned due to the price.

    I have since bought the five pack and I’m wearing a pair now.

    Extremely comfortable and nice looking.

    Will purchase more in due course.

  • Corey Q.
    Verified Buyer
    Rated 4 out of 5 stars
    12/10/24
    Good

    Super comfy

  • Jason E.
    Verified Buyer
    Rated 5 out of 5 stars
    10/21/24
    Merino

    Great fit with style, love em.

  • Mark P.
    Verified Buyer
    Rated 5 out of 5 stars
    10/16/24
    Wool Undies

    These are so comfortable to wear, I might wear them for the next few days

    They’re great

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