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First Line Technology PhaseCore XPC Cooling Vest

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  • Product Description
  • About First Line Technology

XPC Cooling Vests are the best solution to reduce and combat heat stress. XPC Cooling Vests use PhaseCore, a phase change material (PCM), to provide a cooling effect to the body’s core by absorbing body heat.

Users: First Responders/Receivers, HazMat Technicians, Fire Fighters, Bomb Technicians, Law Enforcement Officers, Military Personnel, Industrial Workers, Multiple Sclerosis Patients.

Includes: XPC Vest, PhaseCore 28 Elements (set of 21), Large Extenders (set of 2), Small Extenders (set of 2).

Chest size: One Size Fits Most/ Chest Sizes from 33 to 50 inches.


  • Non-Toxic
  • Machine Washable
  • Easy to Use and Maintain
  • Multiple Sizes with Padded Shoulders
  • Effective Up to 4 Hours
  • Lightweight and Comfortable Design
  • Recharges Without Ice, Water, Refrigeration, or Electricity


  • Vest Material: 3D Polyester Outer Shell, Polyester Mesh Inner Shell.
  • Color: Black or White
  • Weight: 5.0 lbs. (2.3 kg)
  • PhaseCore Element: Each vest contains 21 PhaseCore elements, which are made of a non-toxic, non-flammable salt mixture sealed inside an aluminum wrapper.

How does it work?

XPC Cooling Vests are fitted with a set of 21 – 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. XPC 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 showed that an individual wearing a XPC Cooling Vest with PhaseCore 28 experienced only a 3.6°F (2°C) rise in body surface temperature while an individual without a XPC Cooling Vest experienced a 12.6°F (7°C) rise in body surface temperature. XPC Cooling Vests are effective for up to 4 hours, actual time varies based on physical activity, body type, and the environmental conditions.

How does it recharge?

XPC 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.

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First Line Technology PhaseCore XPC Cooling Vest