These products
incorporate a special water absorbing material into the garment that
when soaked in water expands and will hold many times its weight in water
for an extended period. The garment will feel wet only at first, once
the garment dries the special material still holds water and still provides
evaporative cooling. When water evaporates from a surface,
that surface becomes cooler because heat is expended to change the water
from a liquid into a vapor. A nice breeze on a hot day cools us because
the current of air makes perspiration evaporate quickly. The heat needed
for this evaporation is taken from our body surfaces.
How Does Cold Pack Cooling Work?
These vests
create cooling energy from the use of special cold packs. The cold packs
are frozen, placed into pockets of the garment and deliver a cool temperature
to the wearer of the garment over 2 to 3 hours. The temperature of the
cold packs themselves is consistent for most of that period, usually in
the 40 to 45 degree F range. The cooling temperature will be colder at
the beginning and warmer at the end of the period. Because of the insulating effect of
the garment the temperature the wearer
feels is pleasantly cool.
How Does Phase Change Cooling Work?
These garments
create cooling energy from phase change materials that are incorporated
into packs that are placed in pockets of the garments. After freezing
the packs in ice water or a refrigerator for 30 to 60 minutes, the vests
deliver a constant cool temperature, usually in the 57 to 68 degree F
range. The phase change material maintains this consistent temperature
during its transition from a solid to a liquid and this ensures that the
wearer receives a constant cooling temperature throughout the entire 2 to
3 hour period.
How Does Active Cooling Work?
These products typically incorporate
a coolant, often ice water, that is circulated from a reservoir by
a pump system through tubes connected to a vest. Often a hood is incorporated
into the system also. The temperature of the circulating coolant usually
can be adjusted. The garment has small channels or tubes built into
it that circulates the cooling fluid throughout the garment and then back
to the reservoir. The system operates on batteries, house or car current.
The reservoir is often a cooler and is charged with ice and water. This
type of system will provide many hours of cooling before the ice and
water needs to be recharged.
MSolutions Inc.
1-800-763-8423
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