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 16%
Xtremen Xtremen 91157 Capriati Trunks Color Light Blue
¥3,200
¥3,200
¥3,800
Save 16%
ErgoWear ErgoWear EW1476 MAX COTTON Trunks Color White
¥4,800
¥4,800
¥5,700
Save 16%
ErgoWear ErgoWear EW1597 X4D Trunks Color Smoke Blue
¥5,200
¥5,200
¥6,200
Save 35%
ErgoWear ErgoWear EW1598 X4D Boxer Briefs Color Smoke Blue
¥4,800
¥4,800
¥7,400
SOLD OUT
ErgoWear ErgoWear EW1593 X4D Trunks Color Silver Gray
¥4,000
¥4,000
¥6,100
Save 35%
ErgoWear ErgoWear EW1594 X4D Boxer Briefs Color Silver Gray
¥4,800
¥4,800
¥7,400
Save 16%
ErgoWear ErgoWear EW1472 MAX COTTON Trunks Color Navy Blue
¥4,800
¥4,800
¥5,700
Save 16%
ErgoWear ErgoWear EW1473 MAX COTTON Boxer Briefs Color Navy Blue
¥5,300
¥5,300
¥6,300
Save 34%
ErgoWear ErgoWear EW1601 X4D Trunks Color Navy Blue
¥4,000
¥4,000
¥6,100
Save 16%
ErgoWear ErgoWear EW1480 MAX COTTON Trunks Color Garnet
¥4,800
¥4,800
¥5,700
Save 34%
ErgoWear ErgoWear EW1481 MAX COTTON Boxer Briefs Color Garnet
¥4,100
¥4,100
¥6,200
SOLD OUT
ErgoWear ErgoWear EW1589 X4D Trunks Color Dusty Pink
¥4,000
¥4,000
¥6,100
SOLD OUT
ErgoWear ErgoWear EW1484 MAX COTTON Trunks Color Black
¥3,700
¥3,700
¥5,600
Save 16%
ErgoWear ErgoWear EW1485 MAX COTTON Boxer Briefs Color Black
¥5,300
¥5,300
¥6,300
Save 35%
ErgoWear ErgoWear EW1602 X4D Boxer Briefs Color Navy Blue
¥4,800
¥4,800
¥7,400
Save 34%
Private Structure Private Structure MOUX4103 Mo Lite Mid Waist Trunks Color White
¥2,500
¥2,500
¥3,800
Private Structure Private Structure SCUS4529 Classic Mid Waist Mini Briefs Color Red
¥3,600
¥3,600
Private Structure Private Structure SCUS4529 Classic Mid Waist Mini Briefs Color Purple
¥3,600
¥3,600
Private Structure Private Structure SCUS4530 Classic Mid Waist Trunks Color Navy
¥3,800
¥3,800
Private Structure Private Structure LCUT4417 Alpha Low Waist Harness Trunks Color Black
¥6,100
¥6,100
Private Structure Private Structure LCUT4419 Alpha Low Waist Garter Mini Color Black
¥6,100
¥6,100
Private Structure Private Structure LCUT4420 Alpha Low Waist Mesh Back Jockstrap Trunks Color Black
¥6,100
¥6,100
Save 34%
Private Structure Private Structure MOUX4103 Mo Lite Mid Waist Trunks Color Black
¥2,500
¥2,500
¥3,800
Save 15%
ErgoWear ErgoWear EW1504 HIP Trunks Color Sky Blue
¥3,300
¥3,300
¥3,900
Save 15%
ErgoWear ErgoWear EW1498 HIP Trunks Color Dark Green
¥3,300
¥3,300
¥3,900
Save 15%
ErgoWear ErgoWear EW1495 HIP Trunks Color Dark Gray
¥3,300
¥3,300
¥3,900
Save 15%
ErgoWear ErgoWear EW1501 HIP Trunks Color Burgundy
¥3,300
¥3,300
¥3,900
Save 15%
ErgoWear ErgoWear EW1636 MAX XX Boxer Briefs Color Dark Blue
¥5,300
¥5,300
¥6,200
Save 35%
ErgoWear ErgoWear EW1624 MAX XX Boxer Briefs Color Burgundy
¥4,000
¥4,000
¥6,200
Save 16%
ErgoWear ErgoWear EW1623 MAX XX Trunks Color Burgundy
¥4,700
¥4,700
¥5,600