The Loon Aquel Floatant is long lasting, silicon based that won't melt when it's hot or harden when it's cold. Furthermore, the floatant masks human odor and won't leave any slick on even the calmest water.FeaturesPremium dry fly gel floatantTemperature stableSilicon basedWill not leave oil slick on waterOfficial floatant of Fly Fishing Team USAMasks human scent