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ALL BOOTS ARE HANDCRAFTED,❗NOT MASS PRODUCED

ALL BOOTS ARE HANDCRAFTED, ❗NOT MASS PRODUCED

KING WELT • ULTRA FLEX SERIES

Steel Protection.
Ultra Flexibility.

Steel-toe protection, double-zipper convenience, and lightweight performance in rich Habana leather.

MEET THE ULTRA FLEX 339

Job-Site Protection.
All-Shift Comfort.

The King Welt Ultra Flex 6" Habana Double-Zipper Steel-Toe Work Boot combines protective performance, lightweight flexibility, and convenient entry in one rugged work-ready design.

Premium full-grain leather, a protective steel toe, Electrical Hazard protection, welt construction, and a dual-density polyurethane sole provide the durability, traction, and comfort needed for demanding all-around work.

Ultra Flex at a Glance

6" HEIGHT DOUBLE ZIPPER FULL-GRAIN LEATHER STEEL TOE EH PROTECTION SLIP RESISTANT 60-DAY WARRANTY
01

Steel-Toe Protection

The protective steel toe helps guard your feet against impact and compression hazards encountered in demanding work environments.

02

Double-Zipper Entry

Dual side zippers make the Ultra Flex quick and easy to put on and remove while helping provide a secure, comfortable fit.

03

All-Shift Comfort

The Anti-Fatigue Insole and insulated textile lining help keep your feet cushioned, supported, and comfortable through long shifts.

STEEL TOE + EH PROTECTION

Protection for
Demanding Work.

Steel-toe and Electrical Hazard protection add job-site confidence while the lightweight Ultra Flex design helps preserve mobility and comfort.

Steel-toe protection

Electrical Hazard protection

Work-ready construction

DOUBLE-ZIPPER CONVENIENCE

Get Ready Without Slowing Down

The double-zipper design provides convenient access from either side, making the Ultra Flex easy to wear without sacrificing the dependable fit required for active work.

QUICK ENTRY EASY REMOVAL DEPENDABLE FIT 6" PROFILE

Dual-Density Polyurethane Sole

The lightweight dual-density polyurethane sole combines heavy-duty durability with technology engineered for stability, flexibility, and lasting comfort.

Confidence Underfoot

Oil- and slip-resistant traction helps support stable movement across changing work surfaces while maintaining the flexibility needed for active jobs.

OIL RESISTANT SLIP RESISTANT STABLE FLEXIBLE HEAVY-DUTY

PREMIUM MATERIALS

Full-Grain Habana Leather

The full-grain leather upper offers oil- and water-resistant properties, while the insulated textile lining adds comfort and warmth through changing work conditions.

EH

WORKPLACE PROTECTION

Verify Your Required Rating

This boot is listed with steel-toe and Electrical Hazard protection. Always review the product label and your workplace requirements to confirm that its exact protection ratings are appropriate for your job.

Made for the Way You Work

Construction
Warehousing
Shop Work
Manufacturing
All-Around Work
View All Product Details
  • Style: Ultra Flex 339
  • Height: 6 inches
  • Color: Habana
  • Upper: Full-grain leather
  • Leather properties: Oil and water resistant
  • Toe type: Steel toe
  • Closure: Double side zipper
  • Lining: Insulated textile
  • Construction: Welt
  • Insole: Anti-fatigue comfort insole
  • Sole: Dual-density polyurethane
  • Outsole: Oil and slip resistant
  • Protection: Electrical Hazard
  • Performance: Lightweight, flexible and heavy-duty
  • Use: All-around work
  • Warranty: 60 days
How Does the Ultra Flex Fit?

King Welt boots are designed to fit true to size. Order your regular boot size for the best fit. If you wear thick work socks or prefer additional room, consider going up half a size.

How Do I Care for Them?

Brush away loose dirt after wear and clean the leather with a slightly damp cloth. Allow the boots to air-dry naturally away from direct heat. Apply a suitable leather conditioner when needed, testing it on a small hidden area first because conditioning may darken the Habana leather.

60-Day Warranty

The Ultra Flex 339 includes a 60-day warranty. Please review King Welt’s current warranty terms and conditions for complete coverage details.

KING WELT ULTRA FLEX

Stay Protected.
Move with Confidence.

Step into steel-toe protection, double-zipper convenience, lightweight flexibility, and rich Habana style.

PROTECTED FOR WORK • BUILT TO MOVE

All boots are true to size*

4% off

Ultra Flex 6" Habana Double Zipper Work Boots Steel Toe Full-Grain Leather Comfort Insole Oil/Slip Resistant EH

SKU: KW9339SHAB-6
Regular price $134.99 $129.00 4% off
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KING WELT • ULTRA FLEX SERIES

Steel Protection.
Ultra Flexibility.

Steel-toe protection, double-zipper convenience, and lightweight performance in rich Habana leather.

MEET THE ULTRA FLEX 339

Job-Site Protection.
All-Shift Comfort.

The King Welt Ultra Flex 6" Habana Double-Zipper Steel-Toe Work Boot combines protective performance, lightweight flexibility, and convenient entry in one rugged work-ready design.

Premium full-grain leather, a protective steel toe, Electrical Hazard protection, welt construction, and a dual-density polyurethane sole provide the durability, traction, and comfort needed for demanding all-around work.

Ultra Flex at a Glance

6" HEIGHT DOUBLE ZIPPER FULL-GRAIN LEATHER STEEL TOE EH PROTECTION SLIP RESISTANT 60-DAY WARRANTY
01

Steel-Toe Protection

The protective steel toe helps guard your feet against impact and compression hazards encountered in demanding work environments.

02

Double-Zipper Entry

Dual side zippers make the Ultra Flex quick and easy to put on and remove while helping provide a secure, comfortable fit.

03

All-Shift Comfort

The Anti-Fatigue Insole and insulated textile lining help keep your feet cushioned, supported, and comfortable through long shifts.

STEEL TOE + EH PROTECTION

Protection for
Demanding Work.

Steel-toe and Electrical Hazard protection add job-site confidence while the lightweight Ultra Flex design helps preserve mobility and comfort.

Steel-toe protection

Electrical Hazard protection

Work-ready construction

DOUBLE-ZIPPER CONVENIENCE

Get Ready Without Slowing Down

The double-zipper design provides convenient access from either side, making the Ultra Flex easy to wear without sacrificing the dependable fit required for active work.

QUICK ENTRY EASY REMOVAL DEPENDABLE FIT 6" PROFILE

Dual-Density Polyurethane Sole

The lightweight dual-density polyurethane sole combines heavy-duty durability with technology engineered for stability, flexibility, and lasting comfort.

Confidence Underfoot

Oil- and slip-resistant traction helps support stable movement across changing work surfaces while maintaining the flexibility needed for active jobs.

OIL RESISTANT SLIP RESISTANT STABLE FLEXIBLE HEAVY-DUTY

PREMIUM MATERIALS

Full-Grain Habana Leather

The full-grain leather upper offers oil- and water-resistant properties, while the insulated textile lining adds comfort and warmth through changing work conditions.

EH

WORKPLACE PROTECTION

Verify Your Required Rating

This boot is listed with steel-toe and Electrical Hazard protection. Always review the product label and your workplace requirements to confirm that its exact protection ratings are appropriate for your job.

Made for the Way You Work

Construction
Warehousing
Shop Work
Manufacturing
All-Around Work
View All Product Details
  • Style: Ultra Flex 339
  • Height: 6 inches
  • Color: Habana
  • Upper: Full-grain leather
  • Leather properties: Oil and water resistant
  • Toe type: Steel toe
  • Closure: Double side zipper
  • Lining: Insulated textile
  • Construction: Welt
  • Insole: Anti-fatigue comfort insole
  • Sole: Dual-density polyurethane
  • Outsole: Oil and slip resistant
  • Protection: Electrical Hazard
  • Performance: Lightweight, flexible and heavy-duty
  • Use: All-around work
  • Warranty: 60 days
How Does the Ultra Flex Fit?

King Welt boots are designed to fit true to size. Order your regular boot size for the best fit. If you wear thick work socks or prefer additional room, consider going up half a size.

How Do I Care for Them?

Brush away loose dirt after wear and clean the leather with a slightly damp cloth. Allow the boots to air-dry naturally away from direct heat. Apply a suitable leather conditioner when needed, testing it on a small hidden area first because conditioning may darken the Habana leather.

60-Day Warranty

The Ultra Flex 339 includes a 60-day warranty. Please review King Welt’s current warranty terms and conditions for complete coverage details.

KING WELT ULTRA FLEX

Stay Protected.
Move with Confidence.

Step into steel-toe protection, double-zipper convenience, lightweight flexibility, and rich Habana style.

PROTECTED FOR WORK • BUILT TO MOVE

All boots are true to size*

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