Best S Mens Underwear in 2026

Daisy
Last Updated: Jul 19, 2026

At a Glance: Our Top Picks for S Mens Underwear

2UNDR Mens Swing Shift 9" Long Leg Underwear - Black/Grey - 2XL
#TOP1
2Undr Mens Swing Shift 9" Long Leg Underwear
9.6
PM SCORE
2UNDR Mens Swing Shift 3" Boxer Trunk Underwear - Black/Grey - L
#TOP2
2Undr Mens Swing Shift 3" Boxer Trunk Underwear
9.5
PM SCORE
2UNDR Mens Day Shift 6" Boxer Brief Underwear (Red, Small)
#TOP3
2Undr Mens Day Shift 6" Boxer Brief Underwear
9.4
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best S Mens Underwear of 2026

#TOP1

2Undr Mens Swing Shift 9" Long Leg Underwear - Black/Grey - 2Xl

2UNDR
2U01LL.002.2XL
8.00 X 5.00 X 2.00 Inches
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PaddlePro 9.86

Features

JOEYPOUCH - Construction to support your equipment in comfort and style. The innovative design elevates and separates a mans most valuable assets to deliver the perfect fit while preventing unwanted skin contact.

NO-DRIP-TIP - Our thermal reduction fabric features a hydrophobic membrane that quickly disperses unwanted moisture for a soft, comfy, dry environment. Stay cool. Stay comfy.

BAND - 2UNDR uses the highest quality yarn in our roll-resistant waistbands. The comfort is unrivaled and reinforced, to maximize flexibility and feel.

FABRIC: Ultra Soft, Signature Modal Fabric 95% Lenzing Modal Beechwood Fiber, 5% Elastane Shrink resistant material remains soft even after repeated washing.

STITCHING: 2UNDR flat locked stitching and construction seams are intelligently placed to avoid potential rub zones for a seamless look and feel.

2Undr Mens Swing Shift 3" Boxer Trunk Underwear - Black/Grey - L

2UNDR
2U01TR.002.L
7.50 X 4.50 X 1.50 Inches
0.31 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
2UNDR 6.06

Features

JOEYPOUCH - Construction to support your equipment in comfort and style. The innovative design elevates and separates a mans most valuable assets to deliver the perfect fit while preventing unwanted skin contact.

NO-DRIP-TIP - Our thermal reduction fabric features a hydrophobic membrane that quickly disperses unwanted moisture for a soft, comfy, dry environment. Stay cool. Stay comfy.

BAND - 2UNDR uses the highest quality yarn in our roll-resistant waistbands. The comfort is unrivaled and reinforced, to maximize flexibility and feel.

FABRIC: Ultra Soft, Signature Modal Fabric 95% Lenzing Modal Beechwood Fiber, 5% Elastane Shrink resistant material remains soft even after repeated washing.

STITCHING: 2UNDR flat locked stitching and construction seams are intelligently placed to avoid potential rub zones for a seamless look and feel.

2Undr Mens Day Shift 6" Boxer Brief Underwear (Red, Small)

2UNDR
2U13BB
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SPORT + 9.90

Features

Experience paradise in your pants.

This soft, breathable boxer brief is made with versatility for everyday use.

Boxer brief style Super soft, breathable Perfect for daily wear Patented Joey Pouch adds support and comfort 6 inches in length Functional fly Remains soft even after repeated washing Mid rise, falling at the waist Elastic waistband featuring the 2UNDR repeating logo Full coverage The Day Shift Boxer Brief from 2UNDR is made from a soft, luxe bamboo cotton fabric blend that is breathable and feels oh so soft against your skin.

This material is durable and high quality, staying well after many washes and wears.

Stretchy elastane makes the 2UNDR Day Shift Boxer Brief perfect for your everyday activities.

2Undr Mens Night Shift 6" Boxer Brief Underwear (Light Grey, Small)

2UNDR
43213-12261
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PaddlePro 9.87

Features

JOEYPOUCH - Construction to support your equipment in comfort and style. The innovative design elevates and separates a mans most valuable assets to deliver the perfect fit while preventing unwanted skin contact.

NO-DRIP-TIP - Our thermal reduction fabric features a hydrophobic membrane that quickly disperses unwanted moisture for a soft, comfy, dry environment. Stay cool. Stay comfy.

BAND - 2UNDR uses the highest quality yarn in our roll-resistant waistbands. The comfort is unrivaled and reinforced, to maximize flexibility and feel.

FABRIC - 60% nylon 30% polyester 10% elastane Silky nylon/poly blend.

STITCHING - 2UNDR flat locked stitching and construction seams are intelligently placed to avoid potential rub zones for a seamless look and feel.

2Undr Mens Swing Shift 9" Boxer Long Leg Underwear Limited Edition Colors (Pandas, X-Large)

2UNDR
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PaddlePro 9.86

Features

JOEYPOUCH - Construction to support your equipment in comfort and style. The innovative design elevates and separates a mans most valuable assets to deliver the perfect fit while preventing unwanted skin contact.

NO-DRIP-TIP - Our thermal reduction fabric features a hydrophobic membrane that quickly disperses unwanted moisture for a soft, comfy, dry environment. Stay cool. Stay comfy.

BAND - 2UNDR uses the highest quality yarn in our roll-resistant waistbands. The comfort is unrivaled and reinforced, to maximize flexibility and feel.

FABRIC: Ultra Soft, Signature Modal Fabric 95% Lenzing Modal Beechwood Fiber, 5% Elastane Shrink resistant material remains soft even after repeated washing.

STITCHING: 2UNDR flat locked stitching and construction seams are intelligently placed to avoid potential rub zones for a seamless look and feel.

2Undr Mens Power Shift 9" Boxer Long Leg Underwear (Green Camo, X-Large)

2UNDR
2U06LL.147.XL
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PaddlePro 9.87

Features

JOEYPOUCH - Construction to support your equipment in comfort and style. The innovative design elevates and separates a mans most valuable assets to deliver the perfect fit while preventing unwanted skin contact

ATHLETES IN MIND - Worn by some of the biggest names in sports. Compression like style, fits tight, suggested sizing up for increased comfort. Breathable Athletic Mesh Back Panel. Temperature Control.

BAND - 2UNDR uses the highest quality yarn in our roll-resistant waistbands. The comfort is unrivaled and reinforced, to maximize flexibility and feel.

FABRIC: 90% Polyester, 10% Coldskin fabric by Garmatex to enhance the ventilation in our Power Shift model. The thermal reduction fabric promotes extra cooling where excess heat builds up and can reduce the skin temperature by up to 6 degrees.

STITCHING: 2UNDR flat locked stitching and construction seams are intelligently placed to avoid potential rub zones for a seamless look and feel.

2Undr Mens Night Shift 6" Boxer Brief Underwear (Light Grey, Xx-Large)

2UNDR
2U12BB
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PaddlePro 9.87

Features

JOEYPOUCH - Construction to support your equipment in comfort and style. The innovative design elevates and separates a mans most valuable assets to deliver the perfect fit while preventing unwanted skin contact.

NO-DRIP-TIP - Our thermal reduction fabric features a hydrophobic membrane that quickly disperses unwanted moisture for a soft, comfy, dry environment. Stay cool. Stay comfy.

BAND - 2UNDR uses the highest quality yarn in our roll-resistant waistbands. The comfort is unrivaled and reinforced, to maximize flexibility and feel.

FABRIC - 60% nylon 30% polyester 10% elastane Silky nylon/poly blend.

STITCHING - 2UNDR flat locked stitching and construction seams are intelligently placed to avoid potential rub zones for a seamless look and feel.

2Undr Mens Day Shift 6" Boxer Brief Underwear (Grey, Medium)

2UNDR
2U33BB
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PaddlePro 9.86

Features

JOEYPOUCH - Construction to support your equipment in comfort and style. The innovative design elevates and separates a mans most valuable assets to deliver the perfect fit while preventing unwanted skin contact.

NO-DRIP-TIP - Our thermal reduction fabric features a hydrophobic membrane that quickly disperses unwanted moisture for a soft, comfy, dry environment. Stay cool. Stay comfy.

BAND - 2UNDR uses the highest quality yarn in our roll-resistant waistbands. The comfort is unrivaled and reinforced, to maximize flexibility and feel.

FABRIC: 65% bamboo 30% cotton 5% elastane Super soft breathable material, Perfect for everyday wear.

STITCHING: 2UNDR flat locked stitching and construction seams are intelligently placed to avoid potential rub zones for a seamless look and feel.

Top 10 mens underwear Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
2Undr 8

Top 10 mens underwear Brands Pie Chart


We've carried out a comprehensive analysis of 1,830 reviews on mens underwear, using our selection criteria to identify the best options in the men's fashion. Our findings reveal that most customers typically select mens underwear priced around $30.34, with top brands including amazon essentials, bamboo cool, wirarpa, hanes, fruit of the loom, gildan, new balance, reebok and thermajohn and devops

Our team of expert editors reviewed these high-quality items and handpicked the top 8 mens underwear for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the men's fashion category. These include bamboo cool-6, bamboo cool, wirarpa apparel shop, amazon.com, terramar sports inc, sema's fashion, bestprice forever, 1836 total commerce and devops and natural feelings official .

We are dedicated to assisting our users in finding the right briefs Products based on their needs, saving them considerable time when choosing which mens underwear to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.