Cosmo Fit Flight AIR. The Fit Flight AIR is about 35 percent thinner than the standard Fit Flight, which gives it a further weight reduction of about 33 percent!. The durability of the flight remains excellent due to the extra flexibility due to the reduction in thickness. The Fit Flight System eliminates Robin Hooding as the top Flight Unit is an all in one. Only to be used with the Fit Shafts. All flights sold in a set of 3