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

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.

Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Wine
¥3,200
¥3,200
¥3,700
Save 17%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Royal Blue
¥2,900
¥2,900
¥3,500
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Purple
¥3,200
¥3,200
¥3,700
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Pink
¥3,200
¥3,200
¥3,700
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Opal Green
¥3,200
¥3,200
¥3,700
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Navy
¥3,200
¥3,200
¥3,700
Save 17%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Hot Pink
¥2,900
¥2,900
¥3,500
Save 17%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Gray
¥2,900
¥2,900
¥3,500
Save 17%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Coral
¥2,900
¥2,900
¥3,500
Save 17%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Black
¥2,900
¥2,900
¥3,500
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Black
¥3,200
¥3,200
¥3,700
Clever Clever 0604-1 Explore Trunks Color Green
¥3,700
¥3,700
¥0
Doreanse Doreanse 1403-PRN Persian Briefs Color Printed
¥2,400
¥2,400
¥0
Doreanse Doreanse 1281-BLU Hang-loose Briefs Color Blue
¥2,300
¥2,300
¥0
Save 34%
Male Power Male Power 145-278 Galactic Mini Short Color Printed
¥2,100
¥2,100
¥3,200
Xtremen Xtremen 70005 Plus
¥1,200
¥1,200
¥0
Xtremen Xtremen 70004 Plus
¥1,200
¥1,200
¥0
Save 16%
ErgoWear ErgoWear EW1306 MAX SE Boxer Briefs Color Lilac
¥4,900
¥4,900
¥5,800
Clever Clever 1134 Arcane Trunks Color Gray
¥5,200
¥5,200
¥0
Save 34%
Clever Clever 1136 Magical Trunks Color Dark Blue
¥2,700
¥2,700
¥4,100
Save 35%
JOR JOR 1722 Romeo Jockstrap Color White
¥1,500
¥1,500
¥2,300
Save 35%
JOR JOR 1726 Orion Bikini Color White
¥1,500
¥1,500
¥2,300
Save 35%
JOR JOR 1727 Orion Jockstrap Color White
¥1,500
¥1,500
¥2,300
Save 34%
JOR JOR 1741 Riders Briefs Color Royal
¥3,100
¥3,100
¥4,700
Save 35%
JOR JOR 1719 Match Jockstrap Color Red
¥1,500
¥1,500
¥2,300
Save 35%
JOR JOR 1731 Dante Jockstrap Color Purple
¥1,500
¥1,500
¥2,300
Save 34%
JOR JOR 1753 Party Briefs Color Printed
¥3,100
¥3,100
¥4,700
Save 34%
JOR JOR 1733 Celtic Bikini Color Pink
¥2,500
¥2,500
¥3,800
Save 34%
JOR JOR 1731 Dante Jockstrap Color Green
¥2,500
¥2,500
¥3,800
Save 35%
JOR JOR 1750 Rocco Bikini Color Green
¥1,500
¥1,500
¥2,300