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First Line Technology PhaseCore Swede Carbon X Cooling Vest

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  • Product Description
  • About First Line Technology

SWEDE CarbonX Cooling Vests are the best solution to reduce and combat heat stress in electrical and fire hazard environments where flammability protection is required. 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: Structural Fire Fighters, Electrical Workers, Race Car Drivers, Bomb Technicians, HazMat Technicians, Military Personnel, First Responders/Receivers, Industrial Worker.

Includes: SWEDE Vest, PhaseCore 28 Elements (set of 22).

Chest size: S-M: 33″-39″L-XL: 39″-46″2XL-3XL: 46″-52″4XL-5XL: 52″-63″


  • 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 Weight: 4.8 lbs
  • Dimensions: 22 x 16 x 4 inches
  • PhaseCore 28: Activates at 82°F (28°C) and provides a gradual 10°F (6°C) cooling effect of 72°F (22°C). 


  • Vest Material: CarbonX Outer Shell; Polyester Mesh Inner Shell
  • Color: Black
  • Weight: 4.8 lbs. (2.2 kg)
  • PhaseCore Element: Each vest contains 22 PhaseCore elements, which are made of a non-toxic, non-flammable salt mixture sealed inside an aluminum wrapper.

How does it work?

SWEDE Cooling Vests are fitted with a set of (22) 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. SWEDE 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 SWEDE Cooling Vest with PhaseCore 28 experienced only a 3.6°F (2°C) rise in body surface temperature while an individual without a SWEDE Cooling Vest experienced a 12.6°F (7°C) rise in body surface temperature. SWEDE 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?

SWEDE 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.

Chest Size

S-M 33-39 inches
L-XL 39-46 inches
2XL-3XL 46-52 inches
4XL-5XL 52-63 inches


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.

Customer Reviews
First Line Technology PhaseCore Swede Carbon X Cooling Vest