An impact absorbing and resistant bumper for mounting on a base structure, the bumper comprising: at least two extruded or molded layers of polymeric materials formed into an elongated body having a longitudinal axis and being resistant to impact, the elongated body comprising: a first body layer comprised of a first polymeric material having a first selected degree of hardness; a second layer of a second polymeric material having a second degree of hardness that is greater than the first degree of hardness of the first polymeric material; wherein the layers are extruded or molded simultaneously and adhered to each other to extend along the elongated axis of the body, the elongated body having a body configuration taken along a section transverse or radial to the longitudinal axis that forms an enclosure having a continuous curved outer or upper exposed surface (1 Of) and an open undersurface (10s, 10q) accessible for reversibly attaching to the base; the first body layer having a transverse center, a stable transverse width when the elongated body is in a relaxed state and includes an enclosed center aperture embedded within the first body layer and a pair of open recesses embedded within the first body layer disposed laterally adjacent the center aperture, the aperture and recesses extending longitudinally along the longitudinal axis of the elongated body; the second layer being disposed on a distal undersurface of the first body layer and formed into a configuration that is readily attachable to and detachable from the base. at least two extruded or molded layers of polymeric materials formed into an elongated body having a longitudinal axis and being resistant to impact, the elongated body comprising: a first body layer comprised of a first polymeric material having a first selected degree of hardness; a second layer of a second polymeric material having a second degree of hardness that is greater than the first degree of hardness of the first polymeric material; wherein the layers are extruded or molded simultaneously and adhered to each other to extend along the elongated axis of the body, the elongated body having a body configuration taken along a section transverse or radial to the longitudinal axis that forms an enclosure having a continuous curved outer or upper exposed surface (1 Of) and an open undersurface (10s, 10q) accessible for reversibly attaching to the base; the first body layer having a transverse center, a stable transverse width when the elongated body is in a relaxed state and includes an enclosed center aperture embedded within the first body layer and a pair of open recesses embedded within the first body layer disposed laterally adjacent the center aperture, the aperture and recesses extending longitudinally along the longitudinal axis of the elongated body; the second layer being disposed on a distal undersurface of the first body layer and formed into a configuration that is readily attachable to and detachable from the base. a first body layer comprised of a first polymeric material having a first selected degree of hardness; a second layer of a second polymeric material having a second degree of hardness that is greater than the first degree of hardness of the first polymeric material; wherein the layers are extruded or molded simultaneously and adhered to each other to extend along the elongated axis of the body, the elongated body having a body configuration taken along a section transverse or radial to the longitudinal axis that forms an enclosure having a continuous curved outer or upper exposed surface (1 Of) and an open undersurface (10s, 10q) accessible for reversibly attaching to the base; the first body layer having a transverse center, a stable transverse width when the elongated body is in a relaxed state and includes an enclosed center aperture embedded within the first body layer and a pair of open recesses embedded within the first body layer disposed laterally adjacent the center aperture, the aperture and recesses extending longitudinally along the longitudinal axis of the elongated body; the second layer being disposed on a distal undersurface of the first body layer and formed into a configuration that is readily attachable to and detachable from the base.