The Roofnest Featherbed Air is the answer to a perfect night's sleep. This 4" thick, self-inflating mattress makes your nest extra cozy- even for the pickiest sleepers. Note: 57" x 84" mattress will fit the Falcon 3 XL as well as the Falcon 1 XL and Falcon 2 XL tents. Just know that this mattress is shorter than the original mattress in the Falcon 1 and Falcon 2, so there will be a 4-5" of gap at one end. 47" x 80" mattress will fit the Falcon 3 Reg as well as the Falcon 1 Reg and Falcon 2 Reg. Just know that this mattress is shorter than the original mattress in the Falcon 1 and Falcon 2, so there will be a 5" - 6" gap at one end.