Hair roller

A hair roller comprising:

• an inner shell, an outer shell, and a middle shell positioned between the inner shell and the outer shell, all of the inner, middle and outer shells having a cylindrical profile defining a through cavity, wherein:
• the inner, middle and outer shells are fixedly fitted connected together, and are arranged telescopically with respect with each other;
• the inner shell, the middle shell and the outer shell are made of a plastic(s) material, a hook or hair adhesive material, and a metallic material, respectively;
• the hair roller, in an assembled configuration, is provided with a plurality of cut- out regions from the metallic outer shell thus exposing a combination of an outwardly facing metallic surface defined by the outer shell and an outwardly facing surface including the hook or hair adhesive material of the middle shell;
• and
• the ratio of the outwardly facing metallic surface and the outwardly facing surface including the hook or hair adhesive material is substantially 50:50 to 70:30, and
• wherein the inner shell, the middle shell, and the outer shell are made of materials with specific heat capacity of substantially 1800-200 J/Kg-K, 850-1670 J/Kg-K, and 412-913 J/Kg-K, respectively.

A hair roller comprising:

• an inner shell, an outer shell, and a middle shell positioned between the inner shell and the outer shell, all of the inner, middle and outer shells having a cylindrical profile defining a through cavity, wherein:
• the inner, middle and outer shells are fixedly fitted connected together, and are arranged telescopically with respect with each other;
• the inner shell, the middle shell and the outer shell are made of a plastic(s) material, a a hook or hair adhesive material, and a metallic material, respectively;
• and
• the hair roller, in an assembled configuration, is provided with a plurality of cut-out regions from the metallic outer shell thus exposing a combination of an outwardly facing metallic surface defined by the outer shell and an outwardly facing surface including the hook or hair adhesive material of the middle shell.