Honeycomb shades are constructed of two (and in some cases up to three) pieces of layered fabric, pleated and formed into honeycomb shapes.  The pockets of trapped air are what make them so energy efficient.  To effectively double the insulation factor of cellular shades, an additional layer of light filtering fabrics can be added to their design. 

To maximize insulation efficiency, choose the largest honeycomb cells possible - currently two inches and opt for the largest quantity of cells available. 

When in the lowered position, from an outside view point, cellular shades look neat, crisp and like any other flat shade. From the inside the honeycomb structure is visible but still retains its structured, orderly appearance.  When pulled up, cellular shades tuck neatly into the head-rail, folding along the honeycomb edges.

For added light filtration or to completely block out light, blackout cellular shades are also available.  

Honeycomb shades have many additional benefits 

Additional beneficial characteristics of cellular shades include their soft look, yet durable quality.  A potential drawback to very soft fabric, however, is the tendency to pill when rubbed – therefore these extremely soft fabrics are not recommended for high traffic areas of a home.

Cellular shades are a great way to increase sound absorption or to drown out street and outdoor noises.  Add these great details to the fact that most are made of materials that are not only spot resistant, but also wrinkle proof.  Most are washable as well making them an easily maintained window treatment.  Virtually all colors can be found via internet websites or home improvement stores.

When making the decision to use honeycomb or cellular shades, keep in mind they make a wonderful addition to arched windows.  Some manufacturers also produce a honeycomb shade that can be opened not only from the bottom-up, but also from the top-down. 

Skylights are another opening that is well covered in honeycomb shades, especially for those which received direct, hot sunlight, or cold rain/snow weather.  They can provide maximum insulation while still allowing for light to filter through.  There are collapsible wands that make opening and closing relatively easy and in some cases remote controlled shades are available for out of reach windows.