Abstract: A damper (328) for a vehicle suspension system comprising a chamber (338) in which a piston assembly (330) is movable, the piston assembly (330) dividing the chamber (338) into first, second and third volumes (338a, 338b, 338c); the damper including a first compression fluid flow circuit affording fluid communication from the first volume (3380) to the second volume (338b) on a compression stroke of the piston assembly (330), a second compression fluid flow circuit in series with the first fluid flow circuit, the second compression fluid flow circuit affording fluid communication from the second volume (338b) to the third volume (338c) on the compression stroke, wherein one of the first and second compression fluid flow circuits has a flow resistance greater than that of the other of said first and second compression fluid flow circuits.