You will feel the cooling begin within a few short seconds after turning the Power Cell on. The cold water will instantly begin circulating through the Vest.

This will depend on the temperature + your level of activity. STACS 10 Litre package: - Up to 6 hours of cooling STACS 3 Litre package: - Up to 3 hours for low levels of heat/activity - Up to 2 hours for medium levels of heat/activity - Up to 1 hour for high levels of heat/activity The Water Cell is designed to be quickly and easily refillable to allow for continuous use.

The STACS Power cell can run at it's optimum voltage (Medium) level for up to 12 hours before a charge is required.

STACS 10 Litre package: -The total weight of the Vest + Hose (2m length) is under 2kg. The Cooler can accommodate up to 10 litres of water which equates to 10kg of weight. STACS 3 Litre package: -The total weight of the Vest + Water Cell (fully loaded with water/ice) + Pouch is unnder 4kg. The Water Cell can accommodate up to 3 litres of water which equates to 3kg of the weight.