This HPI 10' Commercial-Style, Heavy Duty, 26 Gauge, Double Chamber Water Bag is a black water bag that comes with an intermittent center seal that allows water to weave through, placing water on both sides of the bag. This makes it faster to fill and evenly disperses the water between the two chambers. It has been designed to withstand sub-zero temperatures. The "heat activating" black color also helps to slow the process of the water freezing.This black water bag is manufactured from quality, 26 gauge vinyl. Only fill your water bags ½ - ¾ full to allow room for water freezing expansion during the winter.Tip: If you are having trouble closing a water bag's valve, try soaking them in warm water.Features:Withstands sub-zero temperaturesInhibitors to prevent fadingQuick to fillMeasurements:10' L x 1' W