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 35%
Pikante Pikante PIK 1277 Sonar Briefs Color Fuchsia
¥3,400
¥3,400
¥5,200
Save 35%
Pikante Pikante PIK 1281 Sonar Bikini Color Fuchsia
¥4,000
¥4,000
¥6,200
Save 35%
Xtremen Xtremen 91053-3 3PK Briefs Color Fuchsia-Green-Fuchsia
¥3,200
¥3,200
¥4,900
SOLD OUT
Xtremen Xtremen 91014-3 3PK Briefs Color Blue-Gray-Blue
¥3,200
¥3,200
¥4,900
Save 35%
Xtremen Xtremen 91040-3 3PK Briefs Color Black-White-Gray
¥3,200
¥3,200
¥4,900
Save 32%
Xtremen Xtremen 91040-3 3PK Briefs Color Black-White-Blue
¥1,700
¥1,700
¥2,500
Save 15%
Xtremen Xtremen 91021-3 3PK Briefs Color Black-Gray-Blue
¥4,600
¥4,600
¥5,400
Save 35%
Xtremen Xtremen 91054X-3 3PK Jockstrap Color Petrol-Fuchsia-Petrol
¥3,200
¥3,200
¥4,900
Save 32%
Xtremen Xtremen 91057X-3 3PK Bikini Color Gray-Blue-Pink
¥1,700
¥1,700
¥2,500
SOLD OUT
HAWAI HAWAI 42306 Tummy Control Boxer Briefs Color Black
¥1,700
¥1,700
¥2,500
Private Structure Private Structure BAUT4388 Athlete Mini Briefs Color White League
¥4,400
¥4,400
¥0
Private Structure Private Structure BAUT4388 Athlete Mini Briefs Color Red Falcon
¥4,400
¥4,400
¥0
Private Structure Private Structure PBUT4379 Bamboo Trunks Color Olive
¥4,400
¥4,400
¥0
Save 34%
Private Structure Private Structure BAUT4388 Athlete Mini Briefs Color Navy Ranger
¥2,900
¥2,900
¥4,400
Private Structure Private Structure BAUT4389 Athlete Trunks Color Navy Ranger
¥4,400
¥4,400
¥0
Private Structure Private Structure SCUX4070 Classic Trunks Color Baby Blush
¥3,600
¥3,600
¥0
Save 14%
Unico Unico 23080100106 Atlantida Trunks Color 46-Blue
¥4,400
¥4,400
¥5,100
Save 35%
Unico Unico 23080101102 Escantillon Briefs Color 46-Blue
¥3,300
¥3,300
¥5,100
Save 35%
Unico Unico 23080101107 Oleada Briefs Color 46-Blue
¥3,300
¥3,300
¥5,100
Save 14%
Unico Unico 23080100105 Boreal Trunks Color 43-Green
¥4,400
¥4,400
¥5,100
Save 35%
Unico Unico 23080100114 Rayado Trunks Color 43-Blue
¥3,300
¥3,300
¥5,100
SOLD OUT
Clever Clever 1312 Hunch Trunks Color White
¥1,700
¥1,700
¥2,500
Save 32%
Clever Clever 1316 Urge Briefs Color White
¥1,700
¥1,700
¥2,500
Save 33%
Clever Clever 1308 Tribe Briefs Color Green
¥2,800
¥2,800
¥4,200
SOLD OUT
Clever Clever 1320 Creation Trunks Color Green
¥3,200
¥3,200
¥4,900
Save 35%
Clever Clever 1321 Creation Bikini Color Green
¥3,200
¥3,200
¥4,900
Save 14%
Clever Clever 1305 Primary Bikini Color Blue
¥4,300
¥4,300
¥5,000
SOLD OUT
Clever Clever 1314 Hunch Jockstrap Color Black
¥1,000
¥1,000
¥0
Save 34%
Clever Clever 1315 Urge Trunks Color Black
¥4,500
¥4,500
¥6,800
Save 35%
Clever Clever 1316 Urge Briefs Color Black
¥3,000
¥3,000
¥4,600