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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Xtremen Xtremen 91157 Capriati Trunks Color Light Blue
Regular Price
¥3,200
Sale Price
¥3,200
Regular Price
¥3,700
Unit Price
per 
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ErgoWear ErgoWear EW1476 MAX COTTON Trunks Color White
Regular Price
¥4,800
Sale Price
¥4,800
Regular Price
¥5,600
Unit Price
per 
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ErgoWear ErgoWear EW1597 X4D Trunks Color Smoke Blue
Regular Price
¥5,200
Sale Price
¥5,200
Regular Price
¥6,100
Unit Price
per 
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ErgoWear ErgoWear EW1598 X4D Boxer Briefs Color Smoke Blue
Regular Price
¥4,800
Sale Price
¥4,800
Regular Price
¥7,300
Unit Price
per 
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ErgoWear ErgoWear EW1593 X4D Trunks Color Silver Gray
Regular Price
¥4,000
Sale Price
¥4,000
Regular Price
¥6,100
Unit Price
per 
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ErgoWear ErgoWear EW1594 X4D Boxer Briefs Color Silver Gray
Regular Price
¥4,800
Sale Price
¥4,800
Regular Price
¥7,300
Unit Price
per 
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ErgoWear ErgoWear EW1472 MAX COTTON Trunks Color Navy Blue
Regular Price
¥4,800
Sale Price
¥4,800
Regular Price
¥5,600
Unit Price
per 
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ErgoWear ErgoWear EW1473 MAX COTTON Boxer Briefs Color Navy Blue
Regular Price
¥5,300
Sale Price
¥5,300
Regular Price
¥6,200
Unit Price
per 
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ErgoWear ErgoWear EW1601 X4D Trunks Color Navy Blue
Regular Price
¥4,000
Sale Price
¥4,000
Regular Price
¥6,100
Unit Price
per 
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ErgoWear ErgoWear EW1480 MAX COTTON Trunks Color Garnet
Regular Price
¥4,800
Sale Price
¥4,800
Regular Price
¥5,600
Unit Price
per 
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ErgoWear ErgoWear EW1481 MAX COTTON Boxer Briefs Color Garnet
Regular Price
¥4,000
Sale Price
¥4,000
Regular Price
¥6,200
Unit Price
per 
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ErgoWear ErgoWear EW1589 X4D Trunks Color Dusty Pink
Regular Price
¥4,000
Sale Price
¥4,000
Regular Price
¥6,100
Unit Price
per 
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ErgoWear ErgoWear EW1484 MAX COTTON Trunks Color Black
Regular Price
¥3,600
Sale Price
¥3,600
Regular Price
¥5,600
Unit Price
per 
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ErgoWear ErgoWear EW1485 MAX COTTON Boxer Briefs Color Black
Regular Price
¥5,300
Sale Price
¥5,300
Regular Price
¥6,200
Unit Price
per 
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ErgoWear ErgoWear EW1602 X4D Boxer Briefs Color Navy Blue
Regular Price
¥4,800
Sale Price
¥4,800
Regular Price
¥7,300
Unit Price
per 
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Private Structure Private Structure MOUX4103 Mo Lite Mid Waist Trunks Color White
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 Red
Regular Price
¥3,600
Sale Price
¥3,600
Regular Price
Unit Price
per 
Private Structure Private Structure SCUS4529 Classic Mid Waist Mini Briefs Color Purple
Regular Price
¥3,600
Sale Price
¥3,600
Regular Price
Unit Price
per 
Private Structure Private Structure SCUS4530 Classic Mid Waist Trunks Color Navy
Regular Price
¥3,700
Sale Price
¥3,700
Regular Price
Unit Price
per 
Private Structure Private Structure LCUT4417 Alpha Low Waist Harness Trunks Color Black
Regular Price
¥6,100
Sale Price
¥6,100
Regular Price
Unit Price
per 
Private Structure Private Structure LCUT4419 Alpha Low Waist Garter Mini Color Black
Regular Price
¥6,100
Sale Price
¥6,100
Regular Price
Unit Price
per 
Private Structure Private Structure LCUT4420 Alpha Low Waist Mesh Back Jockstrap Trunks Color Black
Regular Price
¥6,100
Sale Price
¥6,100
Regular Price
Unit Price
per 
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Private Structure Private Structure MOUX4103 Mo Lite Mid Waist Trunks Color Black
Regular Price
¥2,400
Sale Price
¥2,400
Regular Price
¥3,700
Unit Price
per 
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ErgoWear ErgoWear EW1504 HIP Trunks Color Sky Blue
Regular Price
¥3,300
Sale Price
¥3,300
Regular Price
¥3,800
Unit Price
per 
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ErgoWear ErgoWear EW1498 HIP Trunks Color Dark Green
Regular Price
¥3,300
Sale Price
¥3,300
Regular Price
¥3,800
Unit Price
per 
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ErgoWear ErgoWear EW1495 HIP Trunks Color Dark Gray
Regular Price
¥3,300
Sale Price
¥3,300
Regular Price
¥3,800
Unit Price
per 
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ErgoWear ErgoWear EW1501 HIP Trunks Color Burgundy
Regular Price
¥3,300
Sale Price
¥3,300
Regular Price
¥3,800
Unit Price
per 
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ErgoWear ErgoWear EW1636 MAX XX Boxer Briefs Color Dark Blue
Regular Price
¥5,200
Sale Price
¥5,200
Regular Price
¥6,100
Unit Price
per 
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ErgoWear ErgoWear EW1624 MAX XX Boxer Briefs Color Burgundy
Regular Price
¥4,000
Sale Price
¥4,000
Regular Price
¥6,100
Unit Price
per 
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ErgoWear ErgoWear EW1623 MAX XX Trunks Color Burgundy
Regular Price
¥4,700
Sale Price
¥4,700
Regular Price
¥5,500
Unit Price
per