Spectacles of at least a single piece of continuous material without fastening arms, of the type whereby the spectacles are supported on a user's nose, wherein the spectacles comprise: at least two optical areas (201, 202) in front of or around the eyes; at least one bridge area between the at least two optical areas; a means of fastening to the nose that tend to close in planes substantially perpendicular to the plane of optical properties; and at least one stabilising means comprising at least a first and a second folding line, or folds, which define a surface between them and are consecutively arranged in the transversal direction relative to the force vector they resist providing rigidity and facilitating the handling of the spectacles by the user, wherein the at least one stabilising means is arranged in the bridge area, or in the fastening means, or both, and further comprises retaining means configured to maintain the configuration of the folds resisting the forces that act during use, wherein the retaining means are configured from the folding lines (206, 306, and 207, 307) with a curvature that prevents the disappearing of the first without the disappearing of the second; or wherein the retaining means of the at least one stabilising means is configured by shortening the outer edge of the stabilising means relative to the second folding line; or wherein the retaining means joins the second folding line with the body of the spectacles, either in the bridge area (503, 603) or in the fastening means (801,901); or wherein the retaining means comprises a hole or cut with a size sufficiently large so that one end of the fastening means can be inserted and attached in the hole. at least two optical areas (201, 202) in front of or around the eyes; at least one bridge area between the at least two optical areas; a means of fastening to the nose that tend to close in planes substantially perpendicular to the plane of optical properties; and at least one stabilising means comprising at least a first and a second folding line, or folds, which define a surface between them and are consecutively arranged in the transversal direction relative to the force vector they resist providing rigidity and facilitating the handling of the spectacles by the user, wherein the at least one stabilising means is arranged in the bridge area, or in the fastening means, or both, and further comprises retaining means configured to maintain the configuration of the folds resisting the forces that act during use, wherein the retaining means are configured from the folding lines (206, 306, and 207, 307) with a curvature that prevents the disappearing of the first without the disappearing of the second; or wherein the retaining means of the at least one stabilising means is configured by shortening the outer edge of the stabilising means relative to the second folding line; or wherein the retaining means joins the second folding line with the body of the spectacles, either in the bridge area (503, 603) or in the fastening means (801,901); or wherein the retaining means comprises a hole or cut with a size sufficiently large so that one end of the fastening means can be inserted and attached in the hole.