• Lightweight disposable overgarment designed to help protect and preserve primary flame-resistant (FR) garments
• Composed of flash spun high density polyethylene breathable nonwoven Tyvek® fabric that has been flame-retardant treated, available only from DuPont™
• For use over primary flame-resistant protective clothing
• Relaxed fit coverall design features a diamond gusset crotch to allow for unrestricted movement
• Offers an inherent barrier against hazardous and non-hazardous particles, oils and greases
• Features red external stitched seams, red zipper and red chest patch border
• Available in hooded and non-hooded options
• Tyvek® 400 SFR garments provide secondary flame resistance when worn over appropriate primary flame-resistant (FR) protective clothing
• Tyvek® 400 SFR garments are designed to be worn over primary FR garments
• Tyvek® 400 SFR garments are self-extinguishing and will not continue to burn, melt, or drip once the fire exposure ends
• Tyvek® 400 SFR garments provide an inherent barrier against particles (down to 1.0 micron in size)
• Tyvek® 400 SFR garments are strong, yet lightweight and soft
• Tyvek® 400 SFR garments offer an ideal balance of protection, durability and comfort

• Oil & Gas
• General Manufacturing
• Maintenance
• Dirty Jobs
• Environmental Services
• Utilities

• Patent-pending
• Red detailing includes red external stitched seams, red zipper and red chest patch border
• Relaxed fit coverall design features a diamond gusset crotch to allow for unrestricted movement
• Available in hooded and non-hooded options

There are two categories of flame-resistant (FR) garments sold for industrial applications: primary FR garments and secondary FR garments (SFR). Each category is designed to perform different tasks. Secondary flame-resistant garments (like Tyvek® 400 SFR and Tychem® 2000 SFR) should not be worn without primary flame-resistant garments underneath. The common industry definitions, according to industry standards, are as follows:

• Primary flame-resistant protective clothing: Protective clothing that is engineered for the primary purpose to provide protection to the wearer from flame and thermal hazards.
• Secondary flame-resistant protective clothing: Protective clothing that is designed to be worn over primary flame-resistant protective clothing without negatively impacting the burn injury protection levels of the primary flame-resistant protective clothing. Secondary FR garments should respond to a fire in a way that doesn’t negatively impact the performance of the primary FR garment when worn as an ensemble. Secondary FR garments should not continue to burn, melt, or drip once the fire exposure ends.

SFR Fabrics​
When selecting a secondary flame-resistant (SFR) protective garment, it is important to examine both the flame-resistant (FR) requirements and perform a hazard assessment for hazardous and nonhazardous particles, liquids, or chemicals. Please visit DuPont™ SafeSPEC™ to learn more about Tyvek® 400 SFR and Tychem® 2000 SFR garments and the specified hazards they help protect against.

Please visit our free online DuPont™ SafeSPEC™ selector tool to help you determine the most appropriate protection based on your hazard risk assessment.

SafeSPEC™ - we're here to help
Our powerful web-based tool can assist you with finding the appropriate DuPont™ garments for chemical, controlled environment, thermal and mechanical hazards.

Certified Industrial Hygienist team
A DuPont™ Certified Industrial Hygienist can conduct a job hazard assessment to help you determine the best DuPont™ garment for a specific hazard.

A new generation of single-use secondary flame-resistant garment technology​

Tyvek® 400 SFR
Provides an inherent barrier against hazardous and non-hazardous particles (down to 1.0 micron in size,) oils and greases. Provides secondary flame resistance when worn over primary FR garments like those made with DuPont™ Nomex®

Tyvek® 400 SFR garments provide only secondary flame-resistant protection. They must always be worn over appropriate primary flame-resistant protective clothing in an environment that needs flame protection, along with other personal protective equipment that protects your face, hands, and feet. For Tyvek® 400 SFR hooded garments, a primary flame-resistant hood/balaclava should be worn. This information is based upon technical data that DuPont™ believes to be reliable. It is subject to revision as additional knowledge and experience become available. It is the user’s responsibility to determine the level of toxicity and the proper personal protective equipment needed. The information set forth herein reflects laboratory performance of fabrics, not complete garments, under controlled conditions.

This information is intended for use by persons having the technical expertise to undertake evaluation under their own specific end-use conditions, at their own discretion and risk. Anyone intending to use this information should first check that the garment selected is suitable for the intended use. The end-user should discontinue use of garment if fabric becomes torn, worn or punctured, to avoid potential chemical exposure. Since conditions of use are beyond our control, DuPont™ MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE AND ASSUME NO LIABILITY IN CONNECTION WITH ANY USE OF THIS INFORMATION. This information is not intended as a license to operate under or a recommendation to infringe any trademark, patent or technical information of DuPont™ or other persons covering any material or its use.