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We don't believe in sales; we believe in rewards. Every additional item in your cart means you're getting a better deal. Consider it our way of saying “thanks."

Amphibious   -   Swim Underwear   -   $ 28

Frequently Asked Questions

Why do I need a pair?

Designed to be worn under your favorite board short or trunk to prevent chafing in all things water related. The Nylon Aquarius™ fabric is soft, smooth, and breathable. Compact and vacation ready - you should be drafting up your OOO email now.

Are they covered under your Try on Guarantee?

Yes, your first pair is covered. We'll send you a different size or issue a refund - no return required.



Size Chart






WAIST (in)

  • 28" - 32"
  • 32" - 36"
  • 37" - 40"
  • 41" - 45"

Try On Guarantee

If you don't love your first pair, we'll send you a different size, style or issue a refund - you can even keep the pair you tried on.

Guys love this stuff

"The amphibious underwear is terrific, perfect under jammers for us lap swimmers. I bought just one pair, should have bought several."

Dan from WI, 34" waist, Size M-L