|Occunomix Miracool Cooling Poncho Vest 902. Smaller, economical version of our MiraCool Cooling vest. MiraCool crystals retain the coolness of cool water and work over lightweight shirt to continuously release cooling sensations which are carried throughout the body.Completely reversible, if cooling sensations diminish, renew and refresh coolness by turning vest inside out. Adjustable side straps.100% cotton fabric. Size: Regular fits man\\\\\\\\\\\\\\\'s jacket size up to 46 American/56 European.