Spare Cooling Pack set for Cool Vests, 8 Cool Packs, 59 Degree, Recharges in 30 minutes

Maximize your cooling!

Booster packs, used in combination with Glacier Packs, will extend the duration of your cooling comfort.

The Glacier Tek booster packs have a lower freezing point and 50% more cooling capacity than the standard packs included in our set of adult cooling packs. The booster packs are designed to be paired with the standard packs to extend the period of cooling comfort by 45 minutes or more. Because it replaces the standard pack, there is no additional weight. The booster packs feature horizontal cells that conform to your torso as you bend and stretch. The set consists of four small packs that weigh 7 ounces each. Because of their lower freezing point, they must be charged in a freezer. Standard packs may be charged in a freezer, refrigerator, or ice water. Once all the packs are solid, slide one of the standard four-cell packs into each pocket of the vest. Then slide one of the three-cell booster packs in each pocket, on the outer side of the four-cell pack. You want the four-cell packs closer to your body; they hold a comfortable temperature of around 58 degrees F. The green booster packs are much colder; they are designed to keep the inner packs cool, but not cold, for longer periods.