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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HAWAI HAWAI 41946 Solid Athletic Jockstrap Color Red
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
HAWAI HAWAI 41946 Solid Athletic Jockstrap Color Vanilla
Regular Price
¥800
Sale Price
¥800
Regular Price
¥0
Unit Price
per 
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HAWAI HAWAI 41946 Solid Athletic Jockstrap Color Coral
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 15%
Unico Unico 22120201105 Cristalino M22 Briefs Color 00-White
Regular Price
¥3,500
Sale Price
¥3,500
Regular Price
¥4,100
Unit Price
per 
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Unico Unico 22120201102 Profundo A22 Briefs Color 82-Dark Blue
Regular Price
¥2,700
Sale Price
¥2,700
Regular Price
¥4,100
Unit Price
per 
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Unico Unico 22120201103 Intenso A22 Briefs Color 99-Black
Regular Price
¥3,500
Sale Price
¥3,500
Regular Price
¥4,100
Unit Price
per 
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Unico Unico 22120100201 Cristalino A22 Boxer Briefs Color 00-White
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
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Unico Unico 22120100214 Nebuloso M22 Boxer Briefs Color 99-Black
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
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Unico Unico 22120201113 Cardenal M22 Briefs Color 82-Dark Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Unico Unico 22120100203 Intenso A22 Boxer Briefs Color 99-Black
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
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Unico Unico 22120201108 Asfalto M22 Briefs Color 96-Dark Gray
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 15%
Unico Unico 22120100207 Intenso M22 Boxer Briefs Color 99-Black
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
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Xtremen Xtremen 91119 Lace Jockstrap Color Coral
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Save 13%
Xtremen Xtremen 91118 Lace Jockstrap Color Black
Regular Price
¥2,600
Sale Price
¥2,600
Regular Price
¥3,000
Unit Price
per 
Save 15%
Xtremen Xtremen 91119 Lace Jockstrap Color Black
Regular Price
¥2,900
Sale Price
¥2,900
Regular Price
¥3,400
Unit Price
per 
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Xtremen Xtremen 91127 Mesh Trunks Color Black
Regular Price
¥2,900
Sale Price
¥2,900
Regular Price
¥3,400
Unit Price
per 
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Roger Smuth Roger Smuth RS077 Thongs Color Navy
Regular Price
¥3,800
Sale Price
¥3,800
Regular Price
¥5,800
Unit Price
per 
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Roger Smuth Roger Smuth RS076 Ball Lifter Color Burgundy
Regular Price
¥4,300
Sale Price
¥4,300
Regular Price
¥5,000
Unit Price
per 
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Roger Smuth Roger Smuth RS075 Jockstrap Color Black
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Roger Smuth Roger Smuth RS076 Ball Lifter Color Black
Regular Price
¥4,300
Sale Price
¥4,300
Regular Price
¥5,000
Unit Price
per 
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Roger Smuth Roger Smuth RS077 Thongs Color Black
Regular Price
¥5,400
Sale Price
¥5,400
Regular Price
¥6,400
Unit Price
per 
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Xtremen Xtremen 91125 Mesh Trunks Color Violet
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Xtremen Xtremen 91138 Mesh Briefs Color Red
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Xtremen Xtremen 91125 Mesh Trunks Color Petrol
Regular Price
¥3,600
Sale Price
¥3,600
Regular Price
¥5,500
Unit Price
per 
Save 13%
Xtremen Xtremen 91140 Ultra-soft Trunks Color Gray Cross
Regular Price
¥2,600
Sale Price
¥2,600
Regular Price
¥3,000
Unit Price
per 
Save 13%
Xtremen Xtremen 91140 Ultra-soft Trunks Color Dark Gray
Regular Price
¥2,600
Sale Price
¥2,600
Regular Price
¥3,000
Unit Price
per 
Save 14%
Xtremen Xtremen 91138 Mesh Briefs Color Dark Blue
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
Save 13%
Xtremen Xtremen 91140 Ultra-soft Trunks Color Dark Blue
Regular Price
¥2,600
Sale Price
¥2,600
Regular Price
¥3,000
Unit Price
per 
Save 35%
Xtremen Xtremen 91116 Metallic Jockstrap Color Black
Regular Price
¥2,400
Sale Price
¥2,400
Regular Price
¥3,700
Unit Price
per 
Save 33%
Xtremen Xtremen 91124 Lace Jockstrap Color Black
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per