The 2009 Wave Pather sails use a material called Technora.

Main characteristics of Technora:

High tensile strength
Strong and light: weight for weight, Technora is 8 times stronger than steel and 3 times stronger than fiberglass, polyester or nylon yarns.

Fatigue resistance
Shows little loss of strength even during repeated abrasion, flexing and stretching.

Dimensional stability
Stiff and highly oriented molecular structure leads to a high modulus of elasticity, low creep and low stress relaxation. Low thermal shrinkage, i.e., excellent dimensional stability.

Heat resistance
Thermal decomposition threshold of 500ºC, so Technora can be used at 200ºC for long periods. At 250ºC, it maintains more than half of its room-temperature tensile strength.

Chemical resistance
Highly resistant to acids, alkalis and organic solvents; not vulnerable to damage caused by steam or sea water.