If the compressed air inlet pressure and temperature remain constant, the outlet temperature of the vortex tube will be kept within the range of ± 1 ° F (± 0.6 ° C) for sustained. Versatile:Designed for a variety of uses, the ice vest is for individuals who are in heat stress related occupations or who are heat sensitive due to multiple sclerosis or other medically related reasons. Adjustable Sizing:Fits most sizes with adjustable sides and shoulder straps. Versatile Designed for a variety of uses, the ice vest is for individuals who are in heat stress related occupations or who are heat sensitive due to multiple sclerosis or other related reasons. Instant on off, easy to control, cooling does not produce any waste. Vortex tube host: 21 x 5.5cm / 8.27 x 2.17 inch (appr.) Vest: 52 x 49cm / 20.47 x 19.29 inch(appr.) Waist belt: 115cm / 45.28 inch (appr.) Package List: Ac Jacket CV1490 Welding Steel Air Compressed Adult Cooling Vest Such as metallurgy, forging, welding, glass, fire, , power plant, boiler plant, sandblasting, paint baking, and so on. Easy pull, slide and zip to fit. One size fits most. 1 x Vortex tube host 1 x Vest 1 x Waist belt Adjustable Sizing Fits most sizes with adjustable sides and shoulder straps. Personal Cooling Products - Vortex Air Wide Application Suitable for high temperature, high fever, high humidity, specially for cold labor environments.