These are now available separately from the pogies to hold other brands of pogies to handlebars. They are a compression-wedge style handlebar plug with a matching outer plate to clamp the pogies firmly to the ends of most handlebars. They fit bars with inner diameters of 16.4mm to 20mm.
The plastic parts are 3D printed from PA (nylon) and flexible polyurethane. They securing bolt is an m4 bolt which can be tightened by the 3mm hex wrench on most bike multitools.
Pogies are not included