Biplane Yoga Mats
A biplane is a fixed-wing aircraft that utilizes two wings that are stacked on top of each other. This configuration was first developed by the Wright brothers and remained in use throughout World War I, but aeronautical advancements made the configuration obsolete by the 1930s. In its heyday, a number of flying aces made their names flying biplanes. For fans of this historic plane, there are a number of biplane yoga mats available.