The sling is one of the oldest projectile devices of humanity.  The oldest representation of a slinger in art may be from Çatalhöyük, from c. 7,000 BC.
 
These slings are hand-woven from yak wool, by the tibetan yak herders  of the Hongyuan(tibetan: Gakog) county of Ngawa Tibetan and Qiang Autonomous Prefecture. 

Notice the colour and pattern would be random due to its hand-made nature.
 
Each sling comes with 6 soft balls for practice.