A gas spring and gas damper assembly comprising: a first end member; a second end member disposed in longitudinally-spaced relation to said first end member; a first flexible wall operatively connected between said first and second end members (402, 404) such that a spring chamber containing pressurized gas is at least partially defined therebetween; a damping chamber wall on said second end member and at least partially disposed within said spring chamber, said damping chamber wall at least partially defining a damping chamber containing pressurized gas; a damper piston disposed within said damping chamber such that a first portion of said damping chamber is formed along one side of said damper piston and a second portion of said damping chamber is formed along an opposing side of said damper piston, said damper piston operatively connected to said first end member and capable of reciprocal movement within said damping chamber in an approximately longitudinal direction; and a second flexible wall operatively connected between said second end member and said damper piston such that a substantially fluid-tight seal is formed between said damper piston and said second end member; said first portion of said damping chamber disposed in fluid communication with said spring chamber such that said pressurized gas can be transferred between said first portion and said spring chamber during reciprocal movement of said damper piston to thereby dissipate kinetic energy acting on said gas spring and gas damper assembly, characterized in that said first and second portions (450, 452) of said damping chamber are fluidically isolated from one another; and said second portion of said damping chamber is disposed in fluid communication with an associated gas atmosphere external to said gas spring and gas damper assembly. a first end member; a second end member disposed in longitudinally-spaced relation to said first end member; a first flexible wall operatively connected between said first and second end members (402, 404) such that a spring chamber containing pressurized gas is at least partially defined therebetween; a damping chamber wall on said second end member and at least partially disposed within said spring chamber, said damping chamber wall at least partially defining a damping chamber containing pressurized gas; a damper piston disposed within said damping chamber such that a first portion of said damping chamber is formed along one side of said damper piston and a second portion of said damping chamber is formed along an opposing side of said damper piston, said damper piston operatively connected to said first end member and capable of reciprocal movement within said damping chamber in an approximately longitudinal direction; and a second flexible wall operatively connected between said second end member and said damper piston such that a substantially fluid-tight seal is formed between said damper piston and said second end member; said first portion of said damping chamber disposed in fluid communication with said spring chamber such that said pressurized gas can be transferred between said first portion and said spring chamber during reciprocal movement of said damper piston to thereby dissipate kinetic energy acting on said gas spring and gas damper assembly, characterized in that said first and second portions (450, 452) of said damping chamber are fluidically isolated from one another; and said second portion of said damping chamber is disposed in fluid communication with an associated gas atmosphere external to said gas spring and gas damper assembly.