Packaging
Aside from the mouse, one finds a warranty card, quick start guide, and two sets of differently-sized replacement mouse feet in the box.
Weight
My scale shows around 67 g (+/- 1 g), which is slightly more than what Ducky claims. Either way, the Feather is a very light mouse, and what's more, holes have been used quite sparingly for weight reduction. In fact, only parts of the sides have them, everything else is solid.
Cable
The Feather features a paracord-like, braided cable. Though not on the same level as the Endgame Gear XM1r or HyperX Pulsefire Haste cable, flexibility is above average, easily eclipsing the VAXEE cables, but ranking below the Xtrfy MZ1 cable and about equal with the Razer Viper Mini cable. The cable has a ferrite bead attached, which reduces signal noise, as well as a gold-plated USB connector. Its measured length is 1.65 m, falling short of the 1.80 m indicated by Ducky. Much like on VAXEE and recent Zowie mice, the cable exit is angled upwards.
Feet
The Feather comes with white-dyed PTFE (Teflon) feet. Glide is very good. The ring around the sensor ensures CPI stays consistent upon applying vertical pressure. By default, four smaller-sized feet are installed, whose shape and size is the same as Microsoft Intellimouse Explorer 3.0 feet. If needed, they can be swapped with bigger, Zowie-like feet, a set of which is included in the box, along with another set of the smaller feet.