Sails are lateen rigged and were traditionally made of pandanus mat sailcloth. The wing is built from aluminum tubing and covered with pre-sewn Dacron sailcloth envelopes. The aircraft is made from bolted together aluminum tubing, with the wing Dacron sailcloth covered. The wings and tail surfaces are covered in pre-sewn Dacron sailcloth envelopes. An alternate dacron/mylar film sailcloth laminate also is approved for the genoa. The aircraft is made from composites, with its double surface wing covered in Dacron sailcloth. The aircraft is made from tubing, with its wing covered in Dacron sailcloth. It is made from aluminum tubing, with the double-surface wing covered in Dacron sailcloth. The aircraft is made from aluminum tubing, with the single-surface wing covered in Dacron sailcloth. Cotton sailcloth is still used for sportswear, upholstery and draperies. Combed singles yarn sailcloth in high counts is used for spinnaker and head sails. The "wa" proa of the Caroline Islands traditionally used pandanus matting as sailcloth. Common sails consist of a lattice framework on which a sailcloth is spread. Post-medieval mill sails have a lattice framework over which the sailcloth is spread. Strands and scrims are used to strengthen or reinforce sailcloth (see laminates below).