Kite string
Kite string can vary somewhat, depending on the size and
type of kite being used. For kiteboarding, simple string will not do
the job. In most instances, kiteboarders use a line that is made from
Dyneema, a polyethylene fiber that is extremely strong.
For a sport kite, polyester kite string is usually recommended. Braided
polyester string is extremely strong, and will not stretch nearly as
much as nylon varieties. This type of string is also much more durable
and is better suited to stunt flying.
Finally, for flying the average kite, simple twine is normally sufficient.
As most of these kites will not put that much stress on the line, string
rated at 30 lbs or lower is enough to do the job. Most hobby shops will
sell this type of string fairly inexpensively.