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.

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Papi Papi UMPA081 2PK Microflex Jockstrap Color Pink-Black
¥1,500
¥1,500
¥2,300
Papi Papi UMPA088 2PK Microflex Brazilian Boxer Briefs Color Turquoise-Black
¥4,400
¥4,400
Save 35%
Papi Papi UMPA081 2PK Microflex Jockstrap Color Alloy-Black
¥1,500
¥1,500
¥2,300
Save 35%
Papi Papi UMPA087 2PK Microflex Jockstrap Color Blue-Black
¥1,500
¥1,500
¥2,300
SOLD OUT
Private Structure Private Structure EPUX4187 Pride Mini Briefs Color Black Rainbow
¥1,200
¥1,200
¥0
SOLD OUT
Private Structure Private Structure EPUX4187 Pride Mini Briefs Freebrush Color White
¥1,200
¥1,200
¥0
Xtremen Xtremen 91107 Protuder Jockstrap Color Navy
¥5,500
¥5,500
¥0
Xtremen Xtremen 91108 C-Ring Harness Color Red
¥5,800
¥5,800
¥0
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Roger Smuth Roger Smuth RS064 Trunks Color Black
¥1,500
¥1,500
¥2,300
Unico Unico 22120100114 Nebuloso M22 Trunks Color 99-Black
¥1,200
¥1,200
¥0
Unico Unico 22120100209 Lustre A22 Boxer Briefs Color 00-White
¥1,200
¥1,200
¥0
SOLD OUT
ErgoWear ErgoWear EW0762 GYM ULTRA Jockstrap Color Black
¥3,300
¥3,300
¥5,100
Save 34%
Clever Clever 0878 Oporto Jockstrap Color White
¥2,300
¥2,300
¥3,500
Clever Clever 0885 Match Boxer Briefs Color White
¥1,200
¥1,200
¥0
Clever Clever 0880 Match Boxer Briefs Color White
¥1,200
¥1,200
¥0
Clever Clever 0886 Caribbean Boxer Briefs Color White
¥1,200
¥1,200
¥0
Clever Clever 0886 Caribbean Boxer Briefs Color Black
¥4,900
¥4,900
¥0
CandyMan CandyMan 99621 Chain and Cuffs Jockstrap Color Black
¥4,500
¥4,500
¥0
CandyMan CandyMan 99623 Garter Jockstrap Color Black
¥7,100
¥7,100
¥0
Unico Unico 22070100108 Parafina Trunks Color 63-Printed
¥1,200
¥1,200
¥0
Unico Unico 22080100107 Beteado Trunks Color 90-Printed
¥1,200
¥1,200
¥0
Unico Unico 22070100107 Utopia Trunks Color 90-Printed
¥4,400
¥4,400
¥0
Unico Unico 22070100109 Filo Trunks Color 90-Printed
¥1,200
¥1,200
¥0
JOR JOR 1607 JOR Trunks Color White
¥1,200
¥1,200
¥0
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JOR JOR 1644 DF Bikini Color Printed
¥1,500
¥1,500
¥2,300
JOR JOR 1607 JOR Trunks Color Black
¥4,500
¥4,500
¥0
JOR JOR 1643 DF Trunks Color Printed
¥1,200
¥1,200
¥0
JOR JOR 1612 Varsity Trunks Color Ochre
¥1,200
¥1,200
¥0
JOR JOR 1641 Galo G-String Color Red
¥4,500
¥4,500
¥0
SOLD OUT
JOR JOR 1648 Guadalupe Trunks Color Printed
¥1,200
¥1,200
¥0