Full Dacron rigs with a vinyl window, made to last. The Dacron sail cloth material is long lasting and durable, combining a 2-piece epoxy mast and easymount boom. All sail sizes have a fixed color, helpful in schools. All sails have three full length battens. The whole rig includes adapter, ropeset and uphaul, packaged in a heavy duty tailored bag, for easy travel and storage. 5.0, 5.5 and 6.0 feature a full size SDM epoxy mast and vario booms, built to withstand the biggest surf.