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 91139 Athletic Jockstrap Color Royal
¥2,100
¥2,100
¥3,300
Save 36%
Xtremen Xtremen 91139 Athletic Jockstrap Color Light Gray
¥2,100
¥2,100
¥3,300
Save 32%
Xtremen Xtremen 91125 Mesh Trunks Color Green
¥1,700
¥1,700
¥2,500
Xtremen Xtremen 70001 Plus
¥1,400
¥1,400
¥0
Xtremen Xtremen 70005 Plus
¥1,400
¥1,400
¥0
Xtremen Xtremen 70004 Plus
¥1,400
¥1,400
¥0
Xtremen Xtremen 70001 Plus
¥1,400
¥1,400
¥0
Xtremen Xtremen 70004 Plus
¥1,400
¥1,400
¥0
Save 32%
Xtremen Xtremen 70005 Plus
¥1,700
¥1,700
¥2,500
Xtremen Xtremen 70005 Plus
¥1,400
¥1,400
¥0
Xtremen Xtremen 70001 Plus
¥1,400
¥1,400
¥0
Xtremen Xtremen 70004 Plus
¥1,400
¥1,400
¥0
SOLD OUT
Clever Clever 1132 Sacred Trunks Color White
¥1,700
¥1,700
¥2,500
Save 35%
Clever Clever 1133 Sacred Briefs Color White
¥3,400
¥3,400
¥5,200
Save 35%
Clever Clever 1140 Glorious Briefs Color White
¥2,800
¥2,800
¥4,300
Save 32%
Clever Clever 1146 Celestial Briefs Color Red
¥1,700
¥1,700
¥2,500
Save 35%
Clever Clever 1126 Vital Trunks Color Green
¥3,400
¥3,400
¥5,200
Save 35%
Clever Clever 1127 Vital Briefs Color Green
¥3,200
¥3,200
¥4,900
SOLD OUT
Clever Clever 1129 Inner Trunks Color Green
¥1,400
¥1,400
¥0
SOLD OUT
Clever Clever 1134 Arcane Trunks Color Gray
¥1,700
¥1,700
¥2,500
SOLD OUT
Clever Clever 1136 Magical Trunks Color Dark Blue
¥3,000
¥3,000
¥4,600
SOLD OUT
Clever Clever 1124 Natura Briefs Color Beige
¥1,700
¥1,700
¥2,500
Save 35%
Unico Unico 23010100104 Erizo Trunks Color 90-Printed
¥3,200
¥3,200
¥4,900
Save 35%
Unico Unico 23010100106 Naufragio Trunks Color 90-Printed
¥3,200
¥3,200
¥4,900
Save 32%
Unico Unico 23010201104 Erizo Briefs Color 90-Printed
¥1,700
¥1,700
¥2,500
Save 35%
Unico Unico 23020100110 Riguroso Trunks Color 29-Printed
¥3,200
¥3,200
¥4,900
Save 32%
Clever Clever 2199 Limited Edition Boxer Briefs Color Pink-40
¥1,700
¥1,700
¥2,500
SOLD OUT
Clever Clever 2199 Limited Edition Boxer Briefs Color White-45
¥1,400
¥1,400
¥0
Clever Clever 2199 Limited Edition Boxer Briefs Color Coral-48
¥1,400
¥1,400
¥0
Save 32%
Xtremen Xtremen 91134 Mesh Jockstrap Color Dark Blue
¥1,700
¥1,700
¥2,500