I'm selling these because I accidentally bought too many. (This is a set of 3, with each set containing 2 thermal insulation curtains) Thermal Insulation Curtain Liner 100 x 225cm, Gray, 2 panels per set, includes 14 S-hooks, blackout, light-filtering, cuts cold air, cuts heat, energy-saving Color: Gray Material: Polyethylene Product Dimensions: 2.25 m length x 1 m width Opacity: 85% blackout Features: Thermal insulation, adjustable Size: 100 x 225cm Includes 2 panels (with 14 S-hooks) Available in two colors: gray (blackout) and white (light-filtering). Easy installation, just hang them on hooks. By letting them hang 10-15cm from the floor, they effectively block cold and heat. You can also cut them to your desired length for fine adjustments. In the cold winter, they block cold air and save on heating costs. In the hot summer, they block heat and save on air conditioning costs. All-season type, usable throughout the year.