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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Roger Smuth Roger Smuth RS005 Jockstrap Color Black
Regular Price
¥5,400
Sale Price
¥5,400
Regular Price
¥6,400
Unit Price
per 
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Roger Smuth Roger Smuth RS012 Jockstrap Color Burgundy
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Roger Smuth Roger Smuth RS014 Jockstrap Color Burgundy
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Roger Smuth Roger Smuth RS014 Jockstrap Color Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Roger Smuth Roger Smuth RS018-1 Jockstrap Color Burgundy
Regular Price
¥4,600
Sale Price
¥4,600
Regular Price
¥5,400
Unit Price
per 
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Unico Unico 22120100107 Intenso M22 Trunks Color 99-Black
Regular Price
¥3,800
Sale Price
¥3,800
Regular Price
¥4,500
Unit Price
per 
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Unico Unico 22110100203 Astros Boxer Briefs Color 90-Black
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
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Unico Unico 23050100119 Pompa Trunks Color 63-Coral
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
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Unico Unico 23080100102 Escantillon Trunks Color 46-Blue
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
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Unico Unico 23080100121 Filamento Trunks Color 46-Blue
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
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Unico Unico 23080101107 Oleada Briefs Color 46-Blue
Regular Price
¥3,100
Sale Price
¥3,100
Regular Price
¥4,800
Unit Price
per 
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Unico Unico 23080101121 Filamento Briefs Color 46-Blue
Regular Price
¥4,100
Sale Price
¥4,100
Regular Price
¥4,800
Unit Price
per 
Private Structure Private Structure SCUS4530 Classic Mid Waist Trunks Color Orange
Regular Price
¥3,700
Sale Price
¥3,700
Regular Price
Unit Price
per 
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Private Structure Private Structure MOUX4104 Mo Lite Mid Waist Mini Briefs Color Navy
Regular Price
¥2,400
Sale Price
¥2,400
Regular Price
¥3,700
Unit Price
per 
Private Structure Private Structure SCUS4529 Classic Mid Waist Mini Briefs Color Black
Regular Price
¥3,600
Sale Price
¥3,600
Regular Price
Unit Price
per 
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Unico Unico 24020100107 Espuma Trunks Color 99-Black
Regular Price
¥3,000
Sale Price
¥3,000
Regular Price
¥4,600
Unit Price
per 
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Unico Unico 24010100103 Dechado Trunks Color 89-Red
Regular Price
¥3,000
Sale Price
¥3,000
Regular Price
¥4,600
Unit Price
per 
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Unico Unico 24020100111 Tallo Trunks Color 89-Red
Regular Price
¥3,000
Sale Price
¥3,000
Regular Price
¥4,600
Unit Price
per 
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Unico Unico 24020100112 Yute Trunks Color 89-Red
Regular Price
¥3,000
Sale Price
¥3,000
Regular Price
¥4,600
Unit Price
per 
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Unico Unico 24020100105 Gasoleo Trunks Color 59-White
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Unico Unico 24020101105 Gasoleo Briefs Color 59-White
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Unico Unico 24010100104 Esquema Trunks Color 46-Blue
Regular Price
¥3,900
Sale Price
¥3,900
Regular Price
¥4,600
Unit Price
per 
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Unico Unico 24020100110 Redondel Trunks Color 46-Blue
Regular Price
¥3,000
Sale Price
¥3,000
Regular Price
¥4,600
Unit Price
per 
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Unico Unico 24020101110 Redondel Briefs Color 46-Blue
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Unico Unico 24020100106 Laca Trunks Color 46-Black
Regular Price
¥3,900
Sale Price
¥3,900
Regular Price
¥4,600
Unit Price
per 
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Hidden Hidden 963 Mesh Jockstrap Color White
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Hidden Hidden 957 Open Butt Trunk Color White
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
Hidden Hidden 957 Open Butt Trunk Color Blue
Regular Price
¥1,300
Sale Price
¥1,300
Regular Price
¥0
Unit Price
per 
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Hidden Hidden 958 Open Side Briefs Color Beige
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per 
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Hidden Hidden 968 Bikini-Trunks Color Black
Regular Price
¥1,600
Sale Price
¥1,600
Regular Price
¥2,400
Unit Price
per