Quick answer

Choose Men's Swim Trunks for a classic, versatile fit that hits right above the knee with a tie waist, or go with Men's Boardies for a shorter, sportier cut with a zip front and hidden ties. Both are unlined and stretchy, so your choice comes down to preferred length and closure style.

Length and fit differences

Men's Swim Trunks typically hit right above the knee, offering a more traditional swim trunk length that many guys find comfortable for casual beach days or lounging. Men's Boardies, on the other hand, hit several inches above the knee, giving a shorter, more athletic look that some prefer for active water sports or warmer weather.

Both styles are true to size, but the brand notes that the Boardies may fit differently than other men's styles, so checking the fit finder is a good idea if you're between sizes.

Closure and pocket features

The Swim Trunks have a simple tie waist and include two front pockets plus one back pocket with velcro. The Boardies add a zip front with button closure and hidden ties at the waist, offering a more secure feel during movement. Both have the same pocket layout, but the Boardies' zip closure may feel more secure for active wear.

Neither style includes a liner, as most men prefer to wear compression shorts underneath, so plan your underlayer accordingly.

Swim trunks vs boardies: trade-offs at a glance

  • Length preference: Swim Trunks hit right above the knee for a classic look; Boardies hit several inches above the knee for a sportier silhouette. If you prefer more coverage, go with Swim Trunks. For a shorter, athletic cut, choose Boardies.
  • Closure security: Swim Trunks use a simple tie waist; Boardies add a zip front with button closure and hidden ties for extra security. Boardies are better for active movement where you don't want the waistband to loosen.
  • Liner situation: Both are unlined, meaning you'll need to wear compression shorts or a swim brief underneath if you want support or modesty. Plan your underlayer before buying; neither style includes a built-in liner.

Product details

  • Men's Swim Trunks: Men's Swim Trunks are unlined, true to size, with a tie waist and stretchy material; they hit right above the knee. This classic cut works well for casual beach days and family matching sets, but you'll need to supply your own compression shorts if you prefer a liner.

    Men's Swim Trunks

    Men's Swim Trunks

  • Men's Boardies: Men's Boardies are unlined, true to size, with a zip front and button closure plus hidden ties; they hit several inches above the knee. The shorter length and zip closure make them ideal for swimming laps or active water sports, though the fit may differ from other men's styles, so check sizing.

    Men's Boardies

    Men's Boardies

Which one should you choose?

Best for

  • Men who want a classic knee-length swim trunk for casual beach days or family matching outfits
  • Active swimmers or athletes who prefer a shorter cut with a secure zip closure

Not ideal for

  • Anyone who wants a built-in liner or compression support without buying additional gear