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
Steel-Toe Protection
The protective steel toe helps guard your feet against impact and compression hazards encountered in demanding work environments.
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.
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.
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.
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.
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
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 MOVEAll boots are true to size*
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
Steel-Toe Protection
The protective steel toe helps guard your feet against impact and compression hazards encountered in demanding work environments.
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.
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.
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.
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.
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
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 MOVEAll boots are true to size*