A seat for a vehicle is disclosed which includes a seat chassis for supporting a back member and a base member. The base member can have a first condition, which extends generally perpendicularly from the back member and is suitable for accommodating the occupant in a sitting position. In a second condition, the base member is retracted and thereby tends to reduce the profile of the seat. In selectively configuring the base member from the first condition to the second condition, the base member tilts such that it rises at the back edge and dips at the front edge.