Most Biminis can be collapsed when not in use, and raised again if shade or shelter from rain is desired.
[1] Bimini tops differ from dodgers in that dodgers include protection in front and on the sides, while a Bimini does not.
The Bimini is used mostly as protection from the sun; it offers no protection from wind, rain, or spray when moving forward at any speed.
The top provides rain protection only if the boat is stationary and there is no wind.
[1] Bimini tops may be made of materials such as stainless steel, polyester, acrylic, or acrylic coated with vinyl.