Underwear...with an Attitude.

Men's Underwear

What you wear underneath is a reflection of how you feel on the outside.

What you wear underneath is a reflection of how you feel on the outside.

Of course, your mood changes every day, so that's why DownUnder Apparel makes sure we have a huge variety of styles of Men's underwear and Men's sleepwear to fit any mood you're in! Find men's briefs, boxer briefs, boxers, trunks, thongs, jockstraps, and unique sexy underwear from the top brands.

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ErgoWear ErgoWear EW0913 MAX Modal Midcut Boxer Briefs Color Peacoat Blue
$19.33
$19.33
$29.74
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ErgoWear ErgoWear EW0917 MAX Modal Midcut Boxer Briefs Color Burgundy
$19.33
$19.33
$29.74
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HAWAI HAWAI 42052 Spots Athletic Jockstrap Color Red
$16.98
$16.98
$0.00
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HAWAI HAWAI 42050 Animal Print Hip Briefs Color Black
$18.99
$18.99
$0.00
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HAWAI HAWAI 41946 Solid Athletic Jockstrap Color Green
$16.98
$16.98
$0.00
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HAWAI HAWAI 41946 Solid Athletic Jockstrap Color Royal Blue
$16.98
$16.98
$0.00
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HAWAI HAWAI 42050 Colorful Hip Briefs Color Blue
$18.99
$18.99
$0.00
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HAWAI HAWAI 42052 Animal Print Athletic Jockstrap Color Black
$16.98
$16.98
$0.00
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HAWAI HAWAI 42050 Illustration Hip Briefs Color Vanilla
$18.99
$18.99
$0.00
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HAWAI HAWAI 42052 Beige Athletic Jockstrap Color Ivory
$16.98
$16.98
$0.00
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HAWAI HAWAI 42050 Lines Hip Briefs Color White
$18.99
$18.99
$0.00
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HAWAI HAWAI 42050 Colorful Hip Briefs Color Magenta
$18.99
$18.99
$0.00
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HAWAI HAWAI 42050 Spots Hip Briefs Color Red
$18.99
$18.99
$0.00
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HAWAI HAWAI 41963 Solid Hip Briefs Color Royal Blue
$18.99
$18.99
$0.00
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HAWAI HAWAI 42052 Lines Athletic Jockstrap Color White
$16.98
$16.98
$0.00
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HAWAI HAWAI 42052 Arabesque Athletic Jockstrap Color Purple
$16.98
$16.98
$0.00
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HAWAI HAWAI 42050 Beige Hip Briefs Color Ivory
$18.99
$18.99
$0.00
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HAWAI HAWAI 42050 Arabesque Hip Briefs Color Purple
$18.99
$18.99
$0.00
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HAWAI HAWAI 41963 Solid Hip Briefs Color Green
$18.99
$18.99
$0.00
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HAWAI HAWAI 42050 Flowers Hip Briefs Color Turquoise
$18.99
$18.99
$0.00
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HAWAI HAWAI 42050 Animal Print Hip Briefs Color Fuchsia
$18.99
$18.99
$0.00
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HAWAI HAWAI 42052 Colorful Athletic Jockstrap Color Blue
$16.98
$16.98
$0.00
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HAWAI HAWAI 42052 Flowers Athletic Jockstrap Color Pink
$16.98
$16.98
$0.00
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HAWAI HAWAI 42052 Colorful Athletic Jockstrap Color Magenta
$16.98
$16.98
$0.00
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HAWAI HAWAI 42052 Flowers Athletic Jockstrap Color Turquoise
$16.98
$16.98
$0.00
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HAWAI HAWAI 42050 Flowers Hip Briefs Color Pink
$18.99
$18.99
$0.00
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HAWAI HAWAI 42052 Illustration Athletic Jockstrap Color Vanilla
$16.98
$16.98
$0.00
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HAWAI HAWAI 42052 Animal Print Athletic Jockstrap Color Fuchsia
$16.98
$16.98
$0.00
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Xtremen Xtremen 91079 Microfiber Bikini Color Dark Blue
$18.94
$18.94
$0.00
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Xtremen Xtremen 91074 Microfiber Briefs Color Black
$18.94
$18.94
$0.00