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First Line Technology PhaseCore Standard Carbon X Cooling Vest

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  • Product Description
  • About First Line Technology

Standard CarbonX Cooling Vests are the best solution to reduce and combat heat stress in electrical and fire hazard environments where flammability protection is required. Standard CarbonX Cooling Vests use PhaseCore, a phase change material (PCM), to provide a cooling effect to the body’s core by absorbing body heat. The CarbonX material is flame retardant.

Users: Law Enforcement, Military Personnel, Crime Scene Investigators, Industrial Workers.

Includes: Standard Vest, PhaseCore 28 Elements (set of 16).

Chest size: This vest is one-size-fits-most and most comfortably fits chest sizes 33″ up to 50″.

For chest sizes 50″ up to 61″ see: Standard CarbonX Vest Extender Set.


  • Non-Toxic
  • Non-Flammable
  • Machine Washable
  • Easy to Use and Maintain
  • One Size Fits Most
  • Effective Up to 3 Hours
  • Lightweight and Comfortable Design
  • Recharges at Room Temperature
  • Recharges Without Ice, Water, Refrigeration, or Electricity


  • Vest Material: CarbonX Outer Shell; Polyester Mesh Inner Shell
  • Color: Black
  • Weight: 3.9 lbs. (1.8 kg)
  • PhaseCore Element: Each vest contains 16 PhaseCore elements, which are made of a non-toxic, non-flammable salt mixture sealed inside an aluminum wrapper.

How does it work?

Standard Cooling Vests are fitted with a set of (16) PhaseCore 28 elements, which have an activation point of 82.4°F (28°C). When the body temperature rises above this point, the elements begin to absorb body heat. When heat is absorbed, the PhaseCore elements provide a comfortable and soothing cooling effect. Standard Cooling Vests hold PhaseCore elements close to the body allowing them to absorb heat most effectively.

Is it effective?

Tests completed in a hot environment have proven that PhaseCore technology is effective in helping to combat the rise in a person’s body surface temperature when in a hot environment. Standard Cooling Vests are effective for up to 3 hours, actual time varies based on physical activity, body type, and the environmental conditions.

How does it recharge? 

Standard Cooling Vests can be recharged by storing the PhaseCore elements in an environment less than the activation point. PhaseCore elements can be recharged more quickly in colder environments. Refrigeration is not required, but will make the recharge period shorter. PhaseCore elements are completely recharged when they return to a solid state. PhaseCore is simple, safe, and reusable.<

First Line Technology designs and manufacturers disaster preparedness and response equipment like our medical ambulance bus (the AmbuBus®), our PhaseCore® Cooling Vests and our line of decontamination equipment, which includes FiberTect® dry decon wipes.

We work with first responders and the military to develop innovative products that make their jobs easier and their lives – and the lives of the people they serve – safer.

First Line has established itself as a leader in product development and deployment. We focus on emergency response missions, and pride ourselves on creating products that are comfortable, effective, and safe for use in hazardous environments.

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First Line Technology PhaseCore Standard Carbon X Cooling Vest