All Underwear

Muscle Nation's Women's & Mens Underwear have been crafted with performance and comfort in mind. Watch this space as we continue to grow our underwear range!

Women’s Underwear

Experience the ultimate comfort with Muscle Nation's Women's Underwear. We've meticulously designed each piece top achieve comfort, and performance. Our seamless designs ensure you won’t have to think twice about your underwear as you squat, lunge, and lift towards your fitness goals.

To find your perfect fit, consult our detailed size guide.

Muscle Nation is your go-to for Women’s Underwear online in Australia. Renowned for flattering and stylish activewear, our women’s underwear stands up to pressure and repeated use. Made from soft, stretchy fabric, these undergarments prioritise comfort and practicality.

Men’s Underwear

Muscle Nation’s Men’s Underwear is designed with performance and comfort in mind. Whether you're training hard or enjoying a rest day, our range of boxer briefs offers unparalleled support and breathability. Crafted from high-quality, moisture-wicking fabrics, our underwear keeps you cool and dry during any activity.

Each piece is designed to move with you, providing support without limiting your range of motion. With a variety of styles and sizes, you’re sure to find the perfect fit. Check out our size guide for detailed measurements.

Muscle Nation is the leading choice for Men’s Underwear online in Australia. Known for our durable and stylish activewear, our men’s underwear ensures comfort and support, even during the most intense workouts. Our innovative designs and soft, stretchy materials make our undergarments a must-have for any fitness enthusiast.

For further details, visit our FAQs or contact our customer service team for help.

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All Accessories Socks & Underwear Underwear
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  • Mens Boxer Briefs - 3Pack - Black-Underwear-S-ACC022581BLK-S-MNAPPRL43588-1-Muscle Nation Mens Boxer Briefs - 3Pack - Black-Underwear-S-ACC022581BLK-S-MNAPPRL43588-2-Muscle Nation
    EOFY SALE 40% OFF

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    Mens Boxer Briefs - 3Pack - Black-Underwear-S-ACC022581BLK-S-MNAPPRL43588-1-Muscle Nation

    Mens Boxer Briefs

    3Pack

    $24.00
    $39.00 $24.00

    Mens Boxer Briefs

    3Pack - Black
    $24.00
    $39.00 $24.00
  • Mens Boxer Briefs - Black Multi-Underwear-S-ACC1125196BLKM-S-MNAPPRL48000-1-Muscle Nation Mens Boxer Briefs - Black Multi-Underwear-S-ACC1125196BLKM-S-MNAPPRL48000-2-Muscle Nation
    EOFY SALE 40% OFF

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    Mens Boxer Briefs - Black Multi-Underwear-S-ACC1125196BLKM-S-MNAPPRL48000-1-Muscle Nation

    Mens Boxer Briefs

    Black Multi

    $24.00
    $39.00 $24.00

    Mens Boxer Briefs

    Black Multi
    $24.00
    $39.00 $24.00
  • Seamless G String - 3 Pack (Black, White, Sand)-Underwear-XS-MNAPPRL8767-MNAPPRL8767-1-Muscle Nation Seamless G String - 3 Pack (Black, White, Sand)-Underwear-XS-MNAPPRL8767-MNAPPRL8767-2-Muscle Nation
    EOFY SALE 40% OFF

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    Seamless G String - 3 Pack (Black, White, Sand)-Underwear-XS-MNAPPRL8767-MNAPPRL8767-1-Muscle Nation

    Seamless G String

    3 Pack (Black, White, Sand)

    $11.00
    $18.00 $11.00

    Seamless G String

    3 Pack (Black, White, Sand)
    $11.00
    $18.00 $11.00
  • Mini G String 3 Pack - Multi-Underwear-XXS-MNAPPRL21286-MNAPPRL21286-1-Muscle Nation Mini G String 3 Pack - Multi-Underwear-XXS-MNAPPRL21286-MNAPPRL21286-2-Muscle Nation
    EOFY SALE 40% OFF

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    Mini G String 3 Pack - Multi-Underwear-XXS-MNAPPRL21286-MNAPPRL21286-1-Muscle Nation

    Mini G String 3 Pack

    Multi

    $11.00
    $18.00 $11.00

    Mini G String 3 Pack

    Multi
    $11.00
    $18.00 $11.00
  • Micro G String-Underwear-Black-3-Muscle Nation Micro G-String - 3 Variety Pack-XXS-4-Muscle Nation
    EOFY SALE 40% OFF

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    Micro G String-Underwear-Black-3-Muscle Nation

    Micro G-String

    1 Pack

    $8.00
    $13.00 $8.00

    Micro G-String

    1 Pack - Black
    $8.00
    $13.00 $8.00
  • Micro G String-Underwear-Blush-4-Muscle Nation Micro G-String - 1 Pack - Blush-Accessories-XXS-ACC022576BLSH-XXS-MNAPPRL43552-2-Muscle Nation
    EOFY SALE 40% OFF

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    Micro G String-Underwear-Blush-4-Muscle Nation

    Micro G-String

    1 Pack

    $7.00
    $13.00 $7.00

    Micro G-String

    1 Pack - Blush
    $7.00
    $13.00 $7.00
  • Seamless G-String - 1Pack - Beige-Underwear-XS-ACC022578BEIGE-XS-MNAPPRL43562-1-Muscle Nation Seamless G-String - 1Pack - Beige-Underwear-XS-ACC022578BEIGE-XS-MNAPPRL43562-2-Muscle Nation
    EOFY SALE 40% OFF

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    Seamless G-String - 1Pack - Beige-Underwear-XS-ACC022578BEIGE-XS-MNAPPRL43562-1-Muscle Nation

    Seamless G-String

    1Pack

    $8.00
    $13.00 $8.00

    Seamless G-String

    1Pack - Beige
    $8.00
    $13.00 $8.00
  • Seamless G-String - 1Pack - Black-Underwear-XS-ACC022578BLK-XS-MNAPPRL43571-1-Muscle Nation Seamless G-String - 1Pack - Black-Underwear-XS-ACC022578BLK-XS-MNAPPRL43571-2-Muscle Nation
    EOFY SALE 40% OFF

    Add to Wishlist

    Seamless G-String - 1Pack - Black-Underwear-XS-ACC022578BLK-XS-MNAPPRL43571-1-Muscle Nation

    Seamless G-String

    1Pack

    $8.00
    $13.00 $8.00

    Seamless G-String

    1Pack - Black
    $8.00
    $13.00 $8.00
  • Seamless G-String - 1Pack - Blush-Underwear-XS-ACC022578BLSH-XS-MNAPPRL43580-1-Muscle Nation Seamless G-String - 1Pack - Blush-Underwear-XS-ACC022578BLSH-XS-MNAPPRL43580-2-Muscle Nation
    EOFY SALE 40% OFF

    Add to Wishlist

    Seamless G-String - 1Pack - Blush-Underwear-XS-ACC022578BLSH-XS-MNAPPRL43580-1-Muscle Nation

    Seamless G-String

    1Pack

    $8.00
    $13.00 $8.00

    Seamless G-String

    1Pack - Blush
    $8.00
    $13.00 $8.00
  • Micro G String-Underwear-Beige-1-Muscle Nation Micro G-String - 1 Pack - Beige-Accessories-XXS-ACC022576BEIGE-XXS-MNAPPRL43534-2-Muscle Nation
    EOFY SALE 40% OFF

    Add to Wishlist

    Micro G String-Underwear-Beige-1-Muscle Nation

    Micro G-String

    1 Pack

    $7.00
    $13.00 $7.00

    Micro G-String

    1 Pack - Beige
    $7.00
    $13.00 $7.00
  • Seamless G-String (3-Pack)-Underwear-1-Muscle Nation Seamless G-String (3-Pack)-Underwear-2-Muscle Nation
    EOFY SALE 40% OFF
    build your bundle

    Seamless G-String (3-Pack)
    $24.00
    $39.00 $24.00