<unk> s range in weight from around 1 to 3.5 kg, depending on the model. While many sub-types do exist,<unk> s fall into one of 5 primary types: *Evaporative<unk> s are typically submersed in water for around 3 – 5 minutes and lightly wrung out or blot dried. They are usually worn outside the clothing and as the water in the<unk>  interacts with specially treated<unk>  crystals or other<unk>  agents, the water evaporates which then causes body temperature to be reduced. They are light weight, easy to use and no electricity is required making them perfect for people on the move. They are also the most affordable form of<unk> . *Ice chilled<unk> s make use of<unk>  energy packs that are activated inside of a freezer and then placed in pockets inside of the<unk> . Because they are very cold to the touch, this type of<unk>  is always worn outside the clothes. *A phase change material (PCM)<unk>  makes use of<unk>  packs that maintain much higher temperatures when refrigerated, frozen, or placed in water. These phase-change packs often contain liquids (typically nontoxic oils and fats) that solidify (like wax) typically between 55 and 65 degrees and usually last between 1.5 – 4 hours. This flexible cooled pack will then help reduce the wearers’ temperature for up to 4 hours. *A cool flow<unk>  makes use of a water flow system that pumps water through the<unk>  using hoses. *Thermoelectric<unk>  works on Peltier effect and cools down the inner surface of the<unk> . It is powered by a portable battery.
Cooling vest
Posey vest
Tao brush
Dental floss
Composting toilet
Mustard bath
Hemostatic Powder Spray TC-325
Surgical elevator