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First Line Technology PhaseCore Swede Mesh Cooling Vest
First Line Technology PhaseCore Swede Mesh Cooling VestFirst Line Technology PhaseCore Swede Mesh Cooling VestFirst Line Technology PhaseCore Swede Mesh Cooling VestFirst Line Technology PhaseCore Swede Mesh Cooling Vest

First Line Technology PhaseCore Swede Mesh Cooling Vest

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Product Description
About First Line Technology

SWEDE Mesh Cooling Vests are a great solution to reduce and combat heat stress. Mesh Cooling Vests use PhaseCore, a phase change material (PCM), to provide a cooling effect to the body’s core by absorbing body heat. Cooling Vests are extremely lightweight and are comfortable for use under body armor and other form-fitting protective apparel.

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

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
  • Utility Belt Cut
  • Lightweight and Comfortable Design
  • Recharges Without Ice, Water, Refrigeration, or Electricity


  • Vest Material: Polyester Mesh
  • Color: Black
  • Weight: 4.6 lbs. (2.1 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 it works?

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.

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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