Zim Sailing is the official class approved builder of the ISCA sailboat. All sails, parts, and fittings sold by Zim Sailing are class legal and approved for International Sunfish Class Association™ racing. In nearly all cases, this equipment is cross compatible with existing lateen rigged boats. When you purchase an ISCA sailboat sail, fitting, or spare part from Zim Sailing or one of its dealers, your purchase supports the growth of ISCA sailing. Shop parts by category below including sails, hull and deck parts, spars, spar fittings, tillers and blades, rigging, accessories, and more for the ISCA sailboat.