STX Rig PowerHD Mini DacronThese rigs are made to last. Made out of Dacron sail cloth material which is long lasting and durable in combination with a two piece alloy mast and a easymount boom. Every sail size has two battens and a fix color which is also very helpful in schools. The whole rig, including adapter, ropeset and uphaul is packaged in a heavy duty tailoredbag for easy travel and storage.