< Underwear

Flex Trunks
Flex Trunks

Flex Trunks

GEL 98

Flex
4.9
Rated 4.9 out of 5 stars
99 Reviews
Trunks
Boxer Briefs
Solid Colors:

Steel

Gronk Colors:
Size:

1

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Our Flex Trunks have been completely upgraded. Built for performance, they feature a custom flex-knit fabric blend that provides full support, breathability, and cool-touch mesh for optimal temperature control.

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Customer Reviews

Don't just take it from us.

4.9
Rated 4.9 out of 5 stars
Based on 99 reviews
SizingRated 0.0 on a scale of minus 2 to 2
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99 reviews
  • Joshua B.
    Flag of United States
    Verified Buyer
    Reviewing
    Flex Trunks
    I recommend this product
    Rated 5 out of 5 stars
    4 years ago
    Love the flex

    Love the flex material. Prefer the brief length. Does stretch out.

    Was this helpful?
  • Rick W.
    Verified Buyer
    Reviewing
    Flex Trunks Black / XL
    I recommend this product
    What is your height? 5' 8"
    What is your body type? Average
    What is your usual clothing size? XL
    Rated 5 out of 5 stars
    3 minutes ago
    Perfect fit

    5 Star Quality, Best ever customer service.

    SizingRated 0.0 on a scale of minus 2 to 2
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  • Harry H.
    Verified Buyer
    Reviewing
    Gronk x BYLT Flex Trunks Late-Bloomer / M
    I recommend this product
    What is your height? 5' 8"
    What is your body type? Athletic / Toned
    What is your usual clothing size? L
    Rated 5 out of 5 stars
    2 weeks ago
    Great underwear

    Fits great amazing material

    SizingRated 0.0 on a scale of minus 2 to 2
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  • Wendell R.
    Verified Buyer
    Reviewing
    Flex Trunks Storm / 2XL
    I recommend this product
    What is your height? 6' 5"
    What is your body type? Broad / Muscular
    What is your usual clothing size? 2XL
    Rated 5 out of 5 stars
    2 weeks ago
    W Rickard

    Love them they are great!

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  • Jeffrey S.
    Verified Buyer
    Reviewing
    Flex Trunks Steel / L
    I recommend this product
    What is your height? 6' 0"
    What is your body type? Athletic / Toned
    What is your usual clothing size? XL
    Rated 4 out of 5 stars
    1 month ago
    Ok good boxers. Ride up a bit on workouts

    The shorter boxers ride up my legs during workout

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