An aerosol device has a first compartment containing a styling composition and a second compartment containing a compressed gas. The styling composition consists essentially of water, at least one linear block copolymer having at least one hydrophilic block and at least one hydrophobic block, the hydrophilic block representing at least 30% by weight of the linear block copolymer, and one or more additives. The styling composition excludes block copolymers of ethylene oxide and of propylene oxide, block copolymers containing urethane units, block copolymers containing siloxane units, and volatile organic compounds.