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 33%
Xtremen Xtremen 91057X-3 3PK Bikini Color Gray-Blue-Pink
¥1,600
¥1,600
¥2,400
Save 35%
HAWAI HAWAI 42308 Microfiber Trunks Color Orange
¥3,000
¥3,000
¥4,600
Save 35%
HAWAI HAWAI 42308 Microfiber Trunks Color Green
¥3,000
¥3,000
¥4,600
Save 33%
HAWAI HAWAI 42306 Tummy Control Boxer Briefs Color Black
¥1,600
¥1,600
¥2,400
Private Structure Private Structure BAUT4388 Athlete Mini Briefs Color White League
¥4,200
¥4,200
¥0
Private Structure Private Structure BAUT4388 Athlete Mini Briefs Color Red Falcon
¥4,200
¥4,200
¥0
Private Structure Private Structure PBUT4379 Bamboo Trunks Color Olive
¥4,200
¥4,200
¥0
Save 36%
Private Structure Private Structure BAUT4388 Athlete Mini Briefs Color Navy Ranger
¥2,700
¥2,700
¥4,200
Private Structure Private Structure BAUT4389 Athlete Trunks Color Navy Ranger
¥4,200
¥4,200
¥0
Private Structure Private Structure SCUX4070 Classic Trunks Color Baby Blush
¥3,400
¥3,400
¥0
Save 14%
Unico Unico 23080100106 Atlantida Trunks Color 46-Blue
¥4,200
¥4,200
¥4,900
Save 35%
Unico Unico 23080101102 Escantillon Briefs Color 46-Blue
¥3,200
¥3,200
¥4,900
Save 14%
Unico Unico 23080100105 Boreal Trunks Color 43-Green
¥4,200
¥4,200
¥4,900
Save 35%
Unico Unico 23080100114 Rayado Trunks Color 43-Blue
¥3,200
¥3,200
¥4,900
SOLD OUT
Clever Clever 1312 Hunch Trunks Color White
¥1,600
¥1,600
¥2,400
Save 33%
Clever Clever 1316 Urge Briefs Color White
¥1,600
¥1,600
¥2,400
Save 35%
Clever Clever 1320 Creation Trunks Color Green
¥3,000
¥3,000
¥4,600
Save 35%
Clever Clever 1321 Creation Bikini Color Green
¥3,000
¥3,000
¥4,600
Save 15%
Clever Clever 1305 Primary Bikini Color Blue
¥4,100
¥4,100
¥4,800
Clever Clever 1314 Hunch Jockstrap Color Black
¥1,000
¥1,000
¥0
Save 35%
Clever Clever 1315 Urge Trunks Color Black
¥4,200
¥4,200
¥6,500
Save 35%
Clever Clever 1316 Urge Briefs Color Black
¥2,800
¥2,800
¥4,300
Save 16%
Xtremen Xtremen 91154 Tulle mesh Trunks Color Red
¥3,200
¥3,200
¥3,800
Save 33%
Xtremen Xtremen 91165 Foil Jockstrap Color Black
¥1,600
¥1,600
¥2,400
SOLD OUT
ErgoWear ErgoWear EW1455 MAX SE Jockstrap Color Black
¥1,600
¥1,600
¥2,400
Save 33%
JOR JOR 1829 Dante Jockstrap Color Yellow
¥1,600
¥1,600
¥2,400
Save 35%
JOR JOR 1840 Nitro Trunks Color White
¥2,800
¥2,800
¥4,300
Save 33%
JOR JOR 1841 Nitro Bikini Color White
¥1,600
¥1,600
¥2,400
Save 33%
JOR JOR 1842 Nitro Jockstrap Color White
¥1,600
¥1,600
¥2,400
Save 14%
JOR JOR 1846 Ares Bikini Color White
¥3,800
¥3,800
¥4,400