These Sliotars above are from a new exhibit Hair hurling balls: Earliest artefacts of our national game, at National Museum of Ireland – Country Life in Castlebar. The earliest was made in the second half of the twelfth century.
The balls are made from matted cow hair with a plaited horsehair covering. The National Museum of Ireland claim there is a link between the name 'sliotar' and the Irish word ‘liotar’, meaning ‘hair’.
Via Meath Chronicle and Nótaí Imill