Amish made nylon saddle strap with metal swivel clasps on either end that can be used to attach the Hit-Air vest's coiled wire (tether or lanyard). This strap is about 14.5" long and is designed for those non Englsih saddles which have no hole under the pommel to attach a night latch or dog collar.
Don't attach to an ordinary carabiner or any decorative saddle ring that could break away during a fall. Don't loop over a saddle horn. You should be able to stand up in the saddle stirrups without being overly stretched or too loose.