With only 86cm (34 inch) boom lenght with 2 elements Moxn in 4m and another 2 in 6m band and the gain is 6,03 dBi in 50 MHz. and 5,95 dBi in 70 MHz. with both bands with more than 30 dB of F/B signal.
This antenna weight is only 3 Kg. for DX holidays, Summer vacations, SOTA or for Field Days.
The feeding is by open-sleeve system, that only need to feed the coax cable to one element.
More info at here