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 36%
Xtremen Xtremen 41313 Printed Briefs Color Royal
¥1,400
¥1,400
¥2,200
Save 17%
Xtremen Xtremen 41313 Printed Briefs Color Orange
¥2,000
¥2,000
¥2,400
Xtremen Xtremen 91130 Printed Jockstrap Color Orange
¥800
¥800
¥0
Save 17%
Xtremen Xtremen 41313 Printed Briefs Color Green
¥2,000
¥2,000
¥2,400
Save 33%
Xtremen Xtremen 91130 Printed Jockstrap Color Green
¥1,600
¥1,600
¥2,400
Save 36%
Roger Smuth Roger Smuth RS077 Thongs Color White
¥3,800
¥3,800
¥5,900
Save 15%
Roger Smuth Roger Smuth RS077 Thongs Color Burgundy
¥5,500
¥5,500
¥6,500
Save 33%
Roger Smuth Roger Smuth RS072 Trunks Color Black
¥1,600
¥1,600
¥2,400
Save 14%
ErgoWear ErgoWear EW1166 X4D Bikini Color White
¥4,900
¥4,900
¥5,700
Save 16%
ErgoWear ErgoWear EW1167 X4D Trunks Color White
¥5,200
¥5,200
¥6,200
Save 14%
ErgoWear ErgoWear EW1162 X4D Bikini Color Stonewash
¥4,900
¥4,900
¥5,700
Save 16%
ErgoWear ErgoWear EW1163 X4D Trunks Color Stonewash
¥5,200
¥5,200
¥6,200
Save 14%
ErgoWear ErgoWear EW1158 X4D Bikini Color Burgundy
¥4,900
¥4,900
¥5,700
Save 16%
ErgoWear ErgoWear EW1159 X4D Trunks Color Burgundy
¥5,200
¥5,200
¥6,200
Save 35%
ErgoWear ErgoWear EW1160 X4D Boxer Briefs Color Burgundy
¥4,800
¥4,800
¥7,400
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Yellow
¥3,100
¥3,100
¥3,600
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Wine
¥3,300
¥3,300
¥3,900
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Turquoise
¥3,300
¥3,300
¥3,900
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Royal Blue
¥3,100
¥3,100
¥3,600
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Red
¥3,300
¥3,300
¥3,900
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Purple
¥3,300
¥3,300
¥3,900
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Pink
¥3,300
¥3,300
¥3,900
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Opal Green
¥3,300
¥3,300
¥3,900
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Neon Green
¥3,300
¥3,300
¥3,900
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Navy
¥3,300
¥3,300
¥3,900
Save 15%
JUSTIN+SIMON JUSTIN+SIMON XSJ22 Cheek Briefs Color Metal Green
¥3,300
¥3,300
¥3,900
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Hot Pink
¥3,100
¥3,100
¥3,600
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Gray
¥3,100
¥3,100
¥3,600
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Coral
¥3,100
¥3,100
¥3,600
Save 14%
JUSTIN+SIMON JUSTIN+SIMON XSJ08 Classic Trunks Color Black
¥3,100
¥3,100
¥3,600