Includes a set of heat elements, topcovers and 1 pair of C-pack batteries; Includes 3 manually controlled heat settings; Ultra-fine heating elements diffusing constant heat for immediate well-being and an optimal foot temperature; The C-pack 1300B batteries provide up to 13 hrs of warmth; C-Pack batteries are suitable for use with Therm-ic Insoles Heat Flat, Heat 3D and Heat Kit range only; Suitable for use with Therm-ic C-Pack battery range only; Stick-on Therm-ic topcover for added comfort and refinish Custom, 3Feet and 3D insoles (1 pair); One size, easy to trim