The Extreme 40 is a class of sailing catamaran created by TornadoSport and designed by Yves Loday.

The boats are 40 feet long and are constructed out of carbon fibre.

Extreme 40s are essentially a scaled-up version of the Tornado sailboat used in The Olympics.

[2] Extreme 40s are 12 metres (40 ft) long, have a 7.0 metres (23 ft) beam, displace 1,250 kilograms (2,760 lb) of water, have a mast height of 19 metres (62 ft) and a claimed top speed of 40 knots (74 km/h; 46 mph).

The gennaker used for downwind sailing is 110 square metres (1,200 sq ft).