Guard Alaska Bearspray Guard Alaska ultra hot pepper spray has proven so effective repelling bears, it is the only one registered with the EPA as a repellent for ALL SPECIES of bear! It is absolutely the most effective and powerful bear defense spray available today. It is environmentally safe! Does not contain flammable or ozone depleting substances. The Guard Alaska has no expatriation date. It works on wet bears because the specific gravity of the carrier is heavier than water. The formula is scientifically proven superior, and endorsed by the Alaska Science & Technology Foundation. 9 Ounce Supersize. Range: Approximately 15-20 feet. Dimensions: 8-3/4" x 2"