Free 2-Day Shipping on Orders Over $50* Up to 25% Off Marmot– Save on Clothing and Gear


Bonus comfort.

Need a little extra warmth and chafe resistance under your boardies? Throw on the Billabong Men's All Day Undershort and slash barrels 'til your legs fall off.

  • Lycra fabric
  • Close-to-skin fit
  • Flatlock seams

Share your thoughts



No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

    Add a:
  • Share a photo
  • Share a video


Only jpg, jpeg, png, gif or bmp files please.

Now review from the App.Download

Here's what others have to say...


Perfect for a lot of water sports.

  • Familiarity:I've put it through the wringer

I have mostly used these in rivers and lakes. As a chafe-r in board shorts, and really any other shorts that I get wet, these acted as a rash guard for my pole and bobbers. They also added warmth for chilly weather boat days. Since they stay covered by shorts usually, they do take a bit to dry leading to a pruny keester, but overall I am really glad I bought them. They do run a bit small and I'm pretty scrawny, so I went with a Medium.