TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The hydrophobic materials are fatty alcohols, oils, fats, waxes wax esters, paraffins or fatty acids. The emulsifiers are anionic, cationic or nonionic. The active agents are panthenol, silicones, vegetable oils, hydrolyzates, antidandruff agents, ceramides or light-protective filters. The humectant is sorbitol, glycerol or propylene glycol. The preservatives are phenoxyethanol, parabens, benzoates, formates, methylene bromide or glurtaronitrile. The surfactants are anionic, cationic or nonionic. The cationic materials is behenyl trimonium chloride or methosulfate. The hydrocarbons (c) are selected from isopentane, isobutane, n-butane, n-propane and n-pentane. Water is contained at 50-98% and perfume oil at 0.05-0.5%. Preferably the container system (a) is a bag-on-valve system, the emulsifier is cationic, the hydrophobic component is a fatty alcohol and the active agent is a silicone. In particular component (b) comprises panthenol, phenoxyethanol, parabens, cetearyl alcohol, isopropyl palmitate, citric acid, cetrimonium chloride, tocopheryl acetate, decyl glucoside, polyethylene glycol-40 (PEG-40) hydrogenated castor oil, propylene glycol, 'Persea Gratissima' (i.e. avocado oil), laureth-4, stearamidopropyl-dimethylamine (plus its lactate), hydroxyethyl cellulose, ceteareth-20, perfume and optionally behentrimonium chloride, PEG/PPG-15/15 dimethicone and/or amodimethicone, trideceth-12 and/or cetrimonium chloride; and component (c) comprises isopentane/isobutane (75/25).    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: Component (b) comprises polyethylene glycol-40 (PEG-40) hydrogenated castor oil, hydroxyethyl cellulose, ceteareth-20, PEG/PPG-15/15 dimethicone and/or amodimethicone. EXAMPLE - An active agent solution comprised 1.0% panthenol, 0.8% Phenonip (RTM; phenoxyethanol and methyl, ethyl, propyl and butyl parabens), 7.0% cetearyl alcohol, 3.0% isopropyl palmitate, 0.2% citric acid, 3.0% cetrimonium chloride, 0.30% tocopheryl acetate, 3.0% decyl glucoside, 68.7% water, 0.5% Cremophor CO 40 (RTM; PEG-40 hydrogenated castor oil), 4.0% propylene glycol, 1.0% 'Persea Gratissima' (avocado oil), 2.0% laureth-4, 1.0% stearamidopropyl-dimethylamine, 2.0% stearamidopropyl-dimethylamine lactate, 0.2% hydroxyethyl cellulose, 1.0% ceteareth-20 and 0.3% perfume. The solution and a propellant comprising isopentane/isobutane (75/25), in ratio 91:9, were filled in the internal bag of a two-chamber dosing system. The inner chamber was filled with compressed air, so that operation of the delivery valve released a mixture of the active agent solution and propellant to develop a foam.