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 14%
Xtremen Xtremen 91201 Jacquard Bikini Color White
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 15%
Xtremen Xtremen 91199 Jacquard Trunks Color Gray
Regular Price
¥3,400
Sale Price
¥3,400
Regular Price
¥4,000
Unit Price
per 
Save 14%
Xtremen Xtremen 91201 Jacquard Bikini Color Gray
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 16%
Xtremen Xtremen 91202 Microfiber Trunks Color Gray
Regular Price
¥3,700
Sale Price
¥3,700
Regular Price
¥4,400
Unit Price
per 
Save 15%
Xtremen Xtremen 91204 Microfiber Bikini Color Gray
Regular Price
¥3,400
Sale Price
¥3,400
Regular Price
¥4,000
Unit Price
per 
Save 15%
Xtremen Xtremen 91199 Jacquard Trunks Color Dark Blue
Regular Price
¥3,400
Sale Price
¥3,400
Regular Price
¥4,000
Unit Price
per 
Save 14%
Xtremen Xtremen 91201 Jacquard Bikini Color Dark Blue
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 16%
Xtremen Xtremen 91202 Microfiber Trunks Color Cherry
Regular Price
¥3,700
Sale Price
¥3,700
Regular Price
¥4,400
Unit Price
per 
Save 15%
Xtremen Xtremen 91204 Microfiber Bikini Color Cherry
Regular Price
¥3,400
Sale Price
¥3,400
Regular Price
¥4,000
Unit Price
per 
Save 16%
Xtremen Xtremen 91202 Microfiber Trunks Color Black
Regular Price
¥3,700
Sale Price
¥3,700
Regular Price
¥4,400
Unit Price
per 
Save 15%
Xtremen Xtremen 91204 Microfiber Bikini Color Black
Regular Price
¥3,400
Sale Price
¥3,400
Regular Price
¥4,000
Unit Price
per 
Save 14%
Xtremen Xtremen 91190 Jacquard Trunks Color Royal Blue
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 14%
Xtremen Xtremen 91190 Jacquard Trunks Color Red
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 14%
Xtremen Xtremen 91190 Jacquard Trunks Color Gray
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 15%
Clever Clever 5373 Australian Latin Briefs Color Black
Regular Price
¥3,400
Sale Price
¥3,400
Regular Price
¥4,000
Unit Price
per 
Save 14%
Xtremen Xtremen 91154 Tulle mesh Trunks Color Navy
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Doreanse Doreanse 1281-TAN Hang-loose Bikini Brief Color Tan
Regular Price
¥2,400
Sale Price
¥2,400
Regular Price
¥0
Unit Price
per 
Save 15%
Unico Unico 24080101117 Trino Briefs Color 99-Printed
Regular Price
¥3,900
Sale Price
¥3,900
Regular Price
¥4,600
Unit Price
per 
Save 15%
Unico Unico 24080100322 Ardid Boxer Briefs Color 99-Black
Regular Price
¥5,200
Sale Price
¥5,200
Regular Price
¥6,100
Unit Price
per 
Save 15%
Unico Unico 24080101110 Infinito Briefs Color 46-Blue
Regular Price
¥3,900
Sale Price
¥3,900
Regular Price
¥4,600
Unit Price
per 
Save 15%
Unico Unico 24080101105 Cairel Briefs Color 43-Green
Regular Price
¥3,900
Sale Price
¥3,900
Regular Price
¥4,600
Unit Price
per 
Save 15%
Unico Unico 24080101112 Hilada Briefs Color 43-Blue
Regular Price
¥3,900
Sale Price
¥3,900
Regular Price
¥4,600
Unit Price
per 
Save 14%
HAWAI HAWAI 42380 Printed Briefs Color Green
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 13%
HAWAI HAWAI 42430 Printed Briefs Color Gray
Regular Price
¥2,600
Sale Price
¥2,600
Regular Price
¥3,000
Unit Price
per 
Save 13%
HAWAI HAWAI 42431 Printed Briefs Color Cocoa
Regular Price
¥2,600
Sale Price
¥2,600
Regular Price
¥3,000
Unit Price
per 
Save 14%
HAWAI HAWAI 42380 Printed Briefs Color Black
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 13%
HAWAI HAWAI 42431 Printed Briefs Color Blue
Regular Price
¥2,600
Sale Price
¥2,600
Regular Price
¥3,000
Unit Price
per 
Save 13%
HAWAI HAWAI 42430 Printed Briefs Color Blue
Regular Price
¥2,600
Sale Price
¥2,600
Regular Price
¥3,000
Unit Price
per 
Save 14%
Clever Clever 1626 Yin Yang Briefs Color White
Regular Price
¥4,300
Sale Price
¥4,300
Regular Price
¥5,000
Unit Price
per 
Save 14%
Clever Clever 1636 Pacif Briefs Color Pink
Regular Price
¥4,300
Sale Price
¥4,300
Regular Price
¥5,000
Unit Price
per