The Free Duo Tent is an exciting addition to the well-regarded line of ultralight Dyneema Composite Fabric (DCF) shelters from Zpacks. With this tent, the company goes where none in the cottage industry have dared to dabble: into the realm of freestanding shelters. Traditionally, this has been the purview of big brand manufacturers, producing a plethoric quagmire of brightly dyed silnylon. Dual-walls, aluminum poles, long zippers, and footprints, representing the latest innovations of the old guard, define most shelter offerings found at major outdoor stores such as REI.  While DCF is beginning to creep into the mainstream market, it has, for the most part, remained absent from the showroom floor.