Insert-cooled vests have pockets that hold inserts that keep workers cool. Inserts are charged in a freezer or cooler before use. They cool the body to the same temperature regardless of ambient temperature so they're often worn in extreme heat as evaporative vests cool the body based on ambient air temperature. They cool better than evaporative vests in high humidity, though evaporative vests stay cooler longer in these conditions. They are generally used when wearing a full protective suit where air cannot circulate around the vest to cool as is required by evaporative cooling vests. Insert-cooled vests are heavier than evaporative vests, though fewer inserts can be used to lighten vests. A liner keeps heat out and traps cool air in. 

High-visibility insert-cooled vests have pockets that hold inserts that keep workers cool. Inserts are charged in a freezer or cooler before use. They cool the body to the same temperature regardless of ambient temperature so they're often worn in extreme heat as evaporative vests cool the body based on ambient air temperature. They cool better than evaporative vests in high humidity, though evaporative vests stay cooler longer in these conditions. They are generally used when wearing a full protective suit where air cannot circulate around the vest to cool as is required by evaporative cooling vests. Insert-cooled vests are heavier than evaporative vests, though fewer inserts can be used to lighten vests. A liner keeps heat out and traps cool air in. High-visibility garments are made of bright colors and have reflective materials on the front and back to make workers more visible. They are worn by construction workers, road crews, and emergency response personnel. 

Flame-resistant insert-cooled vests have pockets that hold inserts that keep workers cool. Inserts are charged in a freezer or cooler before use. They cool the body to the same temperature regardless of ambient temperature so they're often worn in extreme heat as evaporative vests cool the body based on ambient air temperature. They cool better than evaporative vests in high humidity, though evaporative vests stay cooler longer in these conditions. They are generally used when wearing a full protective suit where air cannot circulate around the vest to cool as is required by evaporative cooling vests. Insert-cooled vests are heavier than evaporative vests, though fewer inserts can be used to lighten vests. A liner keeps heat out and traps cool air in. Flame-resistant garments are self-extinguishing to protect workers from burns that can occur when working near fire and open flame. 

Evaporative-cooled vests use water to cool workers. Cooling effectiveness is based on ambient air temperature as compared to insert-cooled vests which cool to the same temperature regardless of ambient temperature. Evaporative-cooled vests do not cool as effectively as insert-cooled vests in high-humidity where the water in the vest takes longer to evaporate. They also don't cool effectively when worn under full suits that don't allow air to circulate around the body.

High-visibility evaporative-cooled vests use water to cool workers. Cooling effectiveness is based on ambient air temperature as compared to insert-cooled vests which cool to the same temperature regardless of ambient temperature. Evaporative-cooled vests do not cool as effectively as insert-cooled vests in high-humidity where the water in the vest takes longer to evaporate. They also don't cool effectively when worn under full suits that don't allow air to circulate around the body. High-visibility garments are made of bright colors and have reflective materials on the front and back to make workers more visible. They are worn by construction workers, road crews, and emergency response personnel.