Abstract: A portable spa cover having three rigidly molded, interlocking pieces including two mirror image end pieces and a center piece and designed to conform with the contour of the rim of a spa. Each cover piece has an undersurface and outer surface with a plurality of radial support ribs being formed in the undersurface to provide strength and rigidity. Elongated, tapered male and female hinge members are integrally molded as part of the respective end pieces and center piece and permit the cover pieces to be engaged and disengaged from one another when at an angle with respect to one another, while remaining firmly locked together when the pieces all lie horizontally. The horizontal engagement is further facilitated by resilient fingers which extend out from the male projection at intervals along the cover edge and provide a resiliently biased interlocking mechanism.

Abstract: A portable spa including a cover having two rigidly molded, interlocking halves, designed to conform with the contour of the rim of the spa. The rim includes a vertical extension which interfits with an extrusion used to attach an interchangeable decorative vinyl-covered skirt about the side surface of the spa. The spa structure is supported by an integral molded bottom pan, which provides an upper edge or rim against which the lower edge of the skirt is secured.