Layer it dry roller

A hair roller, comprising:

• a plurality of rigid, thin-walled, elongated, partial-cylindrical members (FIG. 1 (1.)), each having a substantially uniform arch-shaped cross-section, an inner surface, an outer surface, first and second elongated edges and first and second ends, and defining an outside diameter and a first central elongated axis, said plurality of members including at least first, second, and third members, with said first member having a smaller outside diameter than said second member, and with said first and second members and said second and third members being connected together along adjacent elongated edges (FIG. 1 (2.)) for pivoting motion about a pivot axis parallel to the respective central elongated axes, such that, when said first, second and third members are pivoted inwardly about the respective pivot axes, they form a spiral (FIG. 2);
• and
• further comprising equal length projections adjacent the first and second ends of at least one of said members and projecting from one of the inner and outer surfaces of said at least one member, wherein, when said members are pivoted into a spiral, said equal length projections on said at least one of said members contacts another of said members to maintain a gap between said one member and said other member that is contacted by the equal length projections (FIG. 1 (4.)).