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Carhartt B01 Men's Iconic Loose Fit Firm Duck Double-Knee Work Pants | Carhartt

4.5 out of 5 star rating
 

Iconic B01 Firm Duck Double-Front Dungaree

$64.99

  Black

2  
 

    W31 L34     |

Waist (W28 - W50)

Waist

Length (L30 - L36)

Length
 
 

 

 

  Black

2  
 

    W31 L34     |

Waist (W28 - W50)

Waist

Length (L30 - L36)

Length
 
 

 

 

Description

Men's Loose Original Fit, Firm-Hand Cotton Pant That's Built to Last

Hard work in, hard work out. Behind every pair of these pants are 61 pairs of hands that cut, sew, hem, and triple-stitch the 28 pieces that form the classic B01. So before they even show up on the jobsite, they've already lived through several shifts of hard work. These men's dungarees have changed very little since they were introduced in 1939. Rugged design featuring heavy-hauling back pockets and a double layer at the knees. Our heavyweight firm-hand duck is the most durable canvas out there.


Our most generous cut, the loose fit gives you free movement. With a roomy fit through the hips and thigh and cuffs that fit easily over work boots. This fit also allows you to layer underneath for those colder days.

Compatible with the Carhartt Knee Pad
KL0112U

Features

    • 12-ounce, firm-hand, 100% cotton ringspun duck canvas
    • High-rise sits slightly above the waist, with a generous fit in the seat and thigh, and a straight leg opening
    • Double-layer knees with openings for adding knee pads and cleaning out debris
    • Heavy-hauling reinforced back pockets for hand tools and more
    • Multiple tool and utility pockets with left-leg hammer loop
    • Model No. B01-M
    • Imported or Made in USA of Imported Parts

 

 

FAQ:

 

Q. What makes this an iconic Carhartt work pant?

A. Originally introduced in 1939, the Iconic B01 is a legendary Carhartt style that has earned its reputation on jobsites for over 80 years. The heavyweight duck canvas and purpose-built design make it a go-to for tradespeople and hard workers everywhere.

Q. How does firm duck fabric compare to washed duck?

A. Firm duck is heavier and more structured, offering maximum durability that breaks in over time for a custom fit.

 

Q. What type of fit does this dungaree offer?

A. The B01 features a loose fit with generous room through the seat and thigh, giving you unrestricted movement.

Q. Are these pants built for extreme durability?

A. Yes. The combination of firm duck fabric, reinforced stitching, and double-front panels makes them one of the toughest work pants available.

 

Q. Do these pants have storage for tools and gear?

A. They include multiple tool pockets and utility features designed to keep essential items close at hand.

 

Men's Body Measurement Chart

Men’s body measurement chart (inches)
Alpha size Alpha extra small No alpha size available No alpha size available Alpha small No alpha size available No alpha size available No alpha size available Alpha medium No alpha size available No alpha size available Alpha large No alpha size available Alpha extra large No alpha size available Alpha double extra large No alpha size available Alpha triple extra large No alpha size available Alpha four extra large No alpha size available Alpha five extra large No alpha size available Alpha six extra large
Numeric size Size 26 Size 28 Size 29 Size 30 Size 31 Size 32 Size 33 Size 34 Size 35 Size 36 Size 38 Size 40 Size 42 Size 44 Size 46 Size 48 Size 50 Size 52 Size 54 Size 56 Size 58 Size 60 Size 62
Chest measurement in inches 32 No measurement available No measurement available 36 No measurement available No measurement available No measurement available 40 No measurement available No measurement available 44 No measurement available 48 No measurement available 52 No measurement available 56 No measurement available 60 No measurement available 64 No measurement available 68
Waist measurement in inches 26½ 28½ 29½ 30½ 31½ 32½ 33½ 34½ 35½ 36½ 38½ 40½ 42½ 44½ 46½ 48½ 50½ 52½ 54½ 56½ 58½ 60½ 62½
Low hip measurement in inches 31½ 33½ 34½ 35½ 36½ 37½ 38½ 39½ 40⅜ 41⅛ 42¾ 44⅜ 46 47⅝ 49¼ 50⅞ 52½ 54⅛ 55¾ 57⅜ 58⅞ 60⅜ 62

Note: Measurements are in inches

Height, garment length, and inseam
HEIGHT GARMENT LENGTH INSEAM
5’ 3” to 5’ 6” Short 28” - 30”
5’ 7” to 5’ 11” Regular 32”
6’ to 6’ 3” Tall 34” - 36”

How to Measure

Diagram showing where to measure chest, natural waist, and hips.

CHEST:

Measure just under arms and across shoulder blades holding the tape firm and level. If your chest falls between sizes, order the next size up.

NATURAL WAIST:

Bend side to side and find the natural bend in your body; this is your natural waist. Note: It may not be the smallest point.

HIPS:

Measure the fullest point between your natural waist and crotch.

Note: For best results measure over your undergarments. Use a cloth measuring tape.

Fits

Slim Fit: slimmer through hip and thigh; straight leg. Relaxed Fit: relaxed through hip and thigh; tapered leg. Loose Fit: full through hip and thigh; wide leg.

Conversion Charts

Tops

Women’s to men’s tops conversion
WOMEN’S XS S M L XL 2XL 3XL
MEN’S XS-S S S-M M L XL-2XL 3XL

Bottoms

Women’s to men’s bottoms conversion
WOMEN’S 2 4 6 8 10 12 14 16 18 20 22 24 26
MEN’S 30 31 32 33 34 38 40 42 44-46 48 50 52-54 56

Note: Measurements are in inches

 
 
4.5 out of 5 star rating
4.5   5.0
 
   
Rated 5 out of 5
Great pants
October 1, 2026
, , US
Rated 2 out of 5
Baggy
Sizing is crazy baggy like clown pants
September 27, 2026
Bend, OR, US
Rated 4 out of 5
Size Down For True Fit
Solid and great for work as everyone knows. Length is definitely longer by a few inches. My old 30L barely covered my boots. These I need to roll 2-3 times. Waist I would size down one as well if you want a perfect belt-not-needed fit up top. I wear a true 32 waist and this fits closer to a 33. Perhaps a boiling hot wash will get it to shrink up.
September 23, 2026
Newport News, VA, US
Rated 5 out of 5
Durable long wearing work pants
My favorite work pants. Durable and last a long time
September 21, 2026
, , US
Rated 5 out of 5
I will always recommend Carhartt products I have worn Carhartt products for decades, they have never let me down. Always comfortable, always durable THEY JUST WORK
September 10, 2026
, ,