Allegro Vortex Cooler, Metal w/ Snap Tite Coupler* *Cooler Only; Vest sold separately Delivering constant and adjustable cooling, the Vortex Vest is especially popular for workers in confined spaces as well as foundries, steel mills, asbestos abatement and paint baking operations. With no moving parts, the vortex tube forces a simple exchange to separate compressed air into cold air streams. The PVC vest delivers continuous cooled air through its perforated, inner lining. This vest offers full range of motion and can be worn under protective clothing.