A shock absorber comprising - a cylinder having a cylinder wall (12.1); - a piston sealing against the cylinder wall and dividing the cylinder in first and second cylinder chambers (10.1, 10.2), the piston being movable within the cylinder along the cylinder wall and along a longitudinal direction of the piston and the cylinder in inward and outward directions (Mi, Mo) upon inward and outward movement, respectively, of the piston inside the cylinder, a first side (11.1) of the piston being associated with the first cylinder chamber (10.1) and a second side (11.2) of the piston being associated with the second cylinder chamber(10.2); - a first main channel (101, 301) and a first main non-return valve associated with the first main channel such that the first main channel and the first main non-return valve allow and damp a first main fluid flow from the second side (11.2) to the first side (11.1) of the piston; - a second main channel (202, 302) and a second main non-return valve associated with the second main channel such that the second main channel and the second main non-return valve allow and damp a second main fluid flow from the first to the second cylinder chamber; - a comfort channel (105, 205) arranged to allow an auxiliary fluid flow (F11; F21) between the first and second sides (11.1, 11.2) of the piston; and - a comfort valve configured and arranged in the comfort channel such that the comfort valve provides for an open connection for the auxiliary fluid flow through the comfort channel in a rest position of the comfort valve and gradually closes off the auxiliary fluid flow at increasing pressure difference across the comfort valve at either inward or outward movement to influence the auxiliary fluid flow between the first and second sides (11.1, 11.2) of the piston, wherein the comfort valve is configured and arranged to allow deformation of the comfort valve at a pressure difference across the comfort valve, an open area of at least one flow opening allowing the auxiliary fluid flow past the comfort valve being gradually decreased upon increased deformation of the comfort valve, the comfort valve comprises a plate-shaped valve or a stack of at least one plate-shaped valve, optionally the stack of the at least one plate-shaped valve comprising a free end, the at least one flow opening comprises at least one flow opening in the (stack of the at least one) plate-shaped valve characterized in that the shock absorber comprises closing surfaces (110, 210) against which the (stack of the at least one) plate-shaped valve gradually deforms upon inward and outward movement to gradually close off the at least one flow opening in the (stack of the at least one) plate-shaped valve, and the closing surfaces (110, 210) present a curvature, and the (stack of at least one) plate-shaped valve upon deformation conforms to the curvature so that the open area of the at least one flow opening in the (stack of at least one) plate-shaped valve is gradually closed by the closing surfaces. - a cylinder having a cylinder wall (12.1); - a piston sealing against the cylinder wall and dividing the cylinder in first and second cylinder chambers (10.1, 10.2), the piston being movable within the cylinder along the cylinder wall and along a longitudinal direction of the piston and the cylinder in inward and outward directions (Mi, Mo) upon inward and outward movement, respectively, of the piston inside the cylinder, a first side (11.1) of the piston being associated with the first cylinder chamber (10.1) and a second side (11.2) of the piston being associated with the second cylinder chamber(10.2); - a first main channel (101, 301) and a first main non-return valve associated with the first main channel such that the first main channel and the first main non-return valve allow and damp a first main fluid flow from the second side (11.2) to the first side (11.1) of the piston; - a second main channel (202, 302) and a second main non-return valve associated with the second main channel such that the second main channel and the second main non-return valve allow and damp a second main fluid flow from the first to the second cylinder chamber; - a comfort channel (105, 205) arranged to allow an auxiliary fluid flow (F11; F21) between the first and second sides (11.1, 11.2) of the piston; and - a comfort valve configured and arranged in the comfort channel such that the comfort valve provides for an open connection for the auxiliary fluid flow through the comfort channel in a rest position of the comfort valve and gradually closes off the auxiliary fluid flow at increasing pressure difference across the comfort valve at either inward or outward movement to influence the auxiliary fluid flow between the first and second sides (11.1, 11.2) of the piston, wherein