Personal Cooling Vest for Coollet CS-7 Cool Suit Ideal for preventing heatstroke. The Cool Suit CS-7 has numerous vents on the inside that emit cool air. There are no vents on the abdomen to avoid cooling the abdomen. The Cool Suit CS-7 is adjustable around the chest (up to 130cm) and can be adjusted to fit your body shape. Please use it with the personal cooler Coollet VT-7KII. Made of EVA (ethylene-vinyl acetate). Connect to compressed air (compressor) to supply air to the Coollet. This product applies the "vortex theory," where the temperature in the center of the swirling airflow is lower than the surrounding area. By passing compressed air through the main unit and rotating it at high speed in a spiral, the air is cooled by adiabatic expansion. Cool air is exhausted upwards, and hot air is exhausted downwards, allowing for cool and comfortable work. The Cool Suit CS-7 is made of flammable fabric, so do not expose it directly to fire. Supply dry compressed air that does not contain oil mist. Product Name: Shigematsu Personal Cooling Unit Coollet Dedicated Vest CS-7 Cool Suit Material: EVA (Ethylene-vinyl acetate) Color: Blue Weight: 350g Manufacturer: Shigematsu Works