Like most others, I purchased a set of these hangers for washing and drying clothes while traveling.  The hangers are made of a durable material and the seams are tight and well constructed.  I've never felt like these hangers were about to pop.  The air valve is of the bite variety, requiring pressure on the sides in order to let air in or out.  This valve design keep the air in during breaths and saves one from having to rush to plug the valve once inflated.

The hanger design includes a sturdy plastic top hook, a lower portion for hanging lightweight pants or other items, and two small bottom hooks for hanging bathing suit tops or bras.  Clothes dry faster on inflatable hangers due to the improved airflow between the fabric.  Each hanger weighs a mere 2.6 ounces (74 grams) and folds up nicely in order to take up a minimum amount of space in your luggage.