The Selections Corded Blockout Cellular Blind is the perfect modern window furnishings treatment, offering a contemporary aesthetic as well as energy savings within your home. Featuring a 25 mm cell size, the Selections Corded Blockout Cellular Blind is constructed with maximum insulative blockout material for full privacy and energy efficiency. How do Cellular Blinds offer Energy Savings? The unique honeycomb like structure in a cellular blind helps to trap air inside the fabric pockets, which then offers increased insulation and energy efficiency throughout your home.