The Sun Fast 31 is a French sailboat that was designed by Daniel Andrieu as a cruiser-racer and first built in 1991.
[1][2][9][11][12][13] The Sun Fast 31 is a recreational keelboat, built predominantly of fiberglass, with wood trim.
It has a 7/8 fractional sloop, with a deck-stepped mast, two sets of swept spreaders and aluminum spars with discontinuous stainless steel wire rigging.
[1][2][3][4][5] The boat is fitted with a Japanese Yanmar 2GM20 diesel engine of 18 hp (13 kW) for docking and maneuvering.
The galley has a straight layout and is equipped with a two-burner stove, an ice box and a sink.
[2][3][4][5] The boat was at one time supported by a class club that organized racing events, the Sun Fast Association.