< Underwear

Flex Trunks
Flex Trunks

Flex Trunks

$32

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

Black

Gronk Colors:
Size:

1

shipping

Bundle & Save!

|

Shop NowPay in 4 payments of $8.00 withArrow LeftorArrow Left

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.

Styles you might also like.

Explore premium related styles.

Loading...

Frequently bought together.

Shop what the crowd is loving.

Loading...

Best Selling Bundles

Tops

Bottoms

Loading...

Customer Reviews

Don't just take it from us.

4.9
Rated 4.9 out of 5 stars
Based on 100 reviews
SizingRated 0.0 on a scale of minus 2 to 2
Slide 1 selected
Write a Review (Opens in a new window)
100 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?
  • Patricia M.
    Verified Buyer
    Reviewing
    Flex Trunks Black / XL
    I recommend this product
    What is your height? 6' 1"
    What is your body type? Curvy / Plus
    What is your usual clothing size? 2XL
    Rated 5 out of 5 stars
    3 minutes ago
    Flex trunks

    Most comfortable , material smooth no drag on other textures , support where needed, like the shorter thigh length . Good patterns

    SizingRated 0.0 on a scale of minus 2 to 2
    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
    1 month ago
    Perfect fit

    5 Star Quality, Best ever customer service.

    SizingRated 0.0 on a scale of minus 2 to 2
    Was this helpful?
  • 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
    1 month ago
    Great underwear

    Fits great amazing material

    SizingRated 0.0 on a scale of minus 2 to 2
    Was this helpful?
  • 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
    1 month ago
    W Rickard

    Love them they are great!

    SizingRated 0.0 on a scale of minus 2 to 2
    Was this helpful?