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%
CandyMan CandyMan 99478 Jockstrap Thongs Color Orange
¥2,000
¥2,000
¥3,000
SOLD OUT
JOR JOR 1096 Rangers Trunks Color White
¥1,300
¥1,300
¥0
SOLD OUT
Male Power Male Power 145-263 Impressions Short Color Coral
¥1,300
¥1,300
¥0
Private Structure Private Structure PBUX4073 Platinum Bamboo Trunks Color Blush
from ¥3,700
from ¥3,700
¥0
Private Structure Private Structure PBUZ3748 Platinum Bamboo Briefs Color Midnight Navy
¥3,400
¥3,400
¥0
Unico Unico 20160100102 Enchanted Trunks Color 00-White
¥1,300
¥1,300
¥0
Unico Unico 20160100204 Joyful Boxer Briefs Color 00-White
¥1,300
¥1,300
¥0
Unico Unico 20160100103 Illusion Trunks Color 00-White
¥1,300
¥1,300
¥0
Unico Unico 20160100202 Enchanted Boxer Briefs Color 00-White
¥1,300
¥1,300
¥0
Unico Unico 20160100203 Illusion Boxer Briefs Color 00-White
¥1,300
¥1,300
¥0
Save 14%
Xtremen Xtremen 91074 Microfiber Briefs Color Dark Blue
¥2,500
¥2,500
¥2,900
Save 35%
Xtremen Xtremen 91071 Microfiber Sports Briefs Color Dark Blue
¥1,700
¥1,700
¥2,600
Save 14%
Xtremen Xtremen 91069 Microfiber Jacquard Jockstrap Color Gray
¥2,500
¥2,500
¥2,900
Save 16%
Xtremen Xtremen 91032 Butt lifter Jockstrap Color White-Silver
¥2,600
¥2,600
¥3,100
Save 38%
HAWAI HAWAI 42052 Spots Athletic Jockstrap Color Red
¥1,500
¥1,500
¥2,400
SOLD OUT
HAWAI HAWAI 42050 Colorful Hip Briefs Color Blue
¥1,000
¥1,000
¥0
Save 38%
HAWAI HAWAI 42052 Beige Athletic Jockstrap Color Ivory
¥1,500
¥1,500
¥2,400
HAWAI HAWAI 42050 Lines Hip Briefs Color White
¥1,000
¥1,000
¥0
SOLD OUT
HAWAI HAWAI 42052 Lines Athletic Jockstrap Color White
¥800
¥800
¥0
Save 38%
HAWAI HAWAI 42052 Arabesque Athletic Jockstrap Color Purple
¥1,500
¥1,500
¥2,400
HAWAI HAWAI 42052 Flowers Athletic Jockstrap Color Pink
¥800
¥800
¥0
HAWAI HAWAI 42052 Flowers Athletic Jockstrap Color Turquoise
¥800
¥800
¥0
HAWAI HAWAI 42052 Illustration Athletic Jockstrap Color Vanilla
¥800
¥800
¥0
Unico Unico 20070100232 Velocipede Boxer Briefs Color 90-Black
¥1,300
¥1,300
¥0
Unico Unico 20070100234 Palm Tree Boxer Briefs Color 90-Blue
¥1,300
¥1,300
¥0
SOLD OUT
Unico Unico 20070100211 Pocima Boxer Briefs Color 46-Blue
¥1,300
¥1,300
¥0
Unico Unico 20070100132 Velocipede Trunks Color 90-Black
¥1,300
¥1,300
¥0
Save 38%
Unico Unico 20070301232 Velocipede Jockstrap Color 90-Black
¥1,500
¥1,500
¥2,400
Unico Unico 20070100231 Waterfront Boxer Briefs Color 63-Blue
¥1,300
¥1,300
¥0
Unico Unico 20070100229 Scheme Boxer Briefs Color 63-Red
¥1,300
¥1,300
¥0