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%
Male Power Male Power 142-273 Sport Mesh Mini Short Color Black
Regular Price
¥2,400
Sale Price
¥2,400
Regular Price
¥3,700
Unit Price
per 
Save 16%
Male Power Male Power 143-270 Casanova Uplift Mini Short Color Black
Regular Price
¥3,100
Sale Price
¥3,100
Regular Price
¥3,700
Unit Price
per 
SOLD OUT
Male Power Male Power 354-273 Sport Mesh Jock Color Burgundy
Regular Price
¥2,800
Sale Price
¥2,800
Regular Price
¥3,200
Unit Price
per 
Save 13%
Male Power Male Power 353-270 Casanova Uplift Jock Color Black
Regular Price
¥2,800
Sale Price
¥2,800
Regular Price
¥3,200
Unit Price
per 
Save 33%
Xtremen Xtremen 91102 Microfiber Jockstrap Color White
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Xtremen Xtremen 91099 Microfiber Mesh Jockstrap Color Black
Regular Price
¥800
Sale Price
¥800
Regular Price
¥0
Unit Price
per 
Save 33%
Xtremen Xtremen 91099 Microfiber Mesh Jockstrap Color Pink
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 33%
Xtremen Xtremen 91099 Microfiber Mesh Jockstrap Color Red
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 33%
HAWAI HAWAI 41960 Cotton Trunks Color Pink
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
HAWAI HAWAI 41963 Microfiber Briefs Color Light Blue
Regular Price
¥1,000
Sale Price
¥1,000
Regular Price
¥0
Unit Price
per 
Save 36%
HAWAI HAWAI 41962 Cotton Briefs Color Pink
Regular Price
¥1,800
Sale Price
¥1,800
Regular Price
¥2,800
Unit Price
per 
HAWAI HAWAI 42231 Cotton Trunks Color Gray
Regular Price
¥1,300
Sale Price
¥1,300
Regular Price
¥0
Unit Price
per 
Save 33%
HAWAI HAWAI 42222 Microfiber Trunks Color White
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 36%
HAWAI HAWAI 41962 Cotton Briefs Color Black
Regular Price
¥1,800
Sale Price
¥1,800
Regular Price
¥2,800
Unit Price
per 
Save 33%
HAWAI HAWAI 42240 Microfiber Briefs Color Gray
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 35%
HAWAI HAWAI 42222 Microfiber Trunks Color Black
Regular Price
¥2,200
Sale Price
¥2,200
Regular Price
¥3,400
Unit Price
per 
Save 33%
HAWAI HAWAI 42180 Microfiber Trunks Color Royal Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 33%
HAWAI HAWAI 4986 Cotton Trunks Color Pink
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
HAWAI HAWAI 41977 Microfiber Boxer Briefs Color Light Blue
Regular Price
¥1,300
Sale Price
¥1,300
Regular Price
¥0
Unit Price
per 
Save 33%
HAWAI HAWAI 42222 Microfiber Trunks Color Light Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 33%
HAWAI HAWAI 42232 Microfiber Trunks Color Light Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 35%
HAWAI HAWAI 42241 Microfiber Briefs Color Light Blue
Regular Price
¥2,000
Sale Price
¥2,000
Regular Price
¥3,100
Unit Price
per 
Unico Unico 22040100119 Ficus Trunks Color 90-Blue
Regular Price
¥1,300
Sale Price
¥1,300
Regular Price
¥0
Unit Price
per 
Save 33%
Unico Unico 22050201102 Cocotera Briefs Color 90-Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 33%
Unico Unico 22040201106 Aloe Briefs Color 63-Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 33%
Unico Unico 22040100107 Benjamina Trunks Color 63-Printed
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Unico Unico 22040100106 Aloe Trunks Color 63-Blue
Regular Price
¥1,300
Sale Price
¥1,300
Regular Price
¥0
Unit Price
per 
Save 33%
Unico Unico 22050201104 Croton Briefs Color 63-Printed
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
SOLD OUT
Unico Unico 22040100101 Magnusiana Trunks Color 63-Printed
Regular Price
¥1,300
Sale Price
¥1,300
Regular Price
¥0
Unit Price
per 
Save 33%
Papi Papi UMPA074 2PK Microflex Brazilian Trunks Color Tropics-Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per