This PCM CoolOver offers constant cooling and heat stress protection for professionals who need expert cooling underneath protective clothing in (extreme) heat situations. Reactivation is fast and easy; simply put the PCM CoolOver in ice water, freezer or fridge, or just store it at a 3ºC or lower temperature until the CoolOver liquid becomes fully solid. This 21C° PCM CoolOver provides long lasting cooling comfort and protection against heat stress for up to three hours, even during s trenuous activities in high-temperature environments. Available sizes: Universal Available colour: Yellow.