Model GB5 155 Hi-Vis hydration pack joins WorkSmart line of gear bags. Helps protect safety and health of construction crews and others who work outside in hot weather. Made of nylon, in bright lime color for daytime visibility (also comes in black). Accented with reflective glass-bead tape to enhance nighttime visibility. Transports 70 oz. of waterabout a 3-hr. supply for worker, under most conditions. Built-in, closed-cell insulation keepscool, while insulated bite valve helps prevent contamination. Low-profile design includes padded, adjustable straps, on shoulders and chest area, that ensure a comfortable fit.