The Fly Wing Harness Line is designed to be attached to wing handles.
It opens completely for installation and is self-centering which means it will move on the handle to the correct center of effort position, which is different for every wing and rider.
It is also designed to remain loose fitting as to not crush the soft foam handles.
26"-34" range
Slim Line handle attachment
Adjustable length
4mm dyneema rope
Uretane tubing
The Fly Wing Harness Line probably doesn't work well with a boom.
I recommend a standard windsurf harness line for the duotone boom.