The present invention generally relates to passenger aircraft seats. The disclosure focuses on a seat unit arrangement (10) for a cabin and seat units that provide different comfort positions. In some embodiments, a side cushion (14) forms part of a bed surface when the seats are converted to a bed position. In some embodiments, a bed extension (30) is deployed from a stowed position to form a part of the bed surface. In some embodiments, a seat backrest (22) does not form part of the bed surface when the seat unit is in the bed position. In some embodiments, a lounge position is provided when the seat backrest rotates toward a side cushion. In such an embodiment, the passenger may be positioned toward the side cushion such that the passenger may comfortably rest their legs on the side cushion without converting the seat to a bed position.

A seat assembly includes a support and a seat cushion defining a recess. The seat cushion is disposed on the support. The seat assembly further includes a cushion insert removably disposed in the recess and a fastener assembly removably coupling the cushion insert to the support such that the cushion insert is removable from the recess.

An adjustable sofa-bed assembly for use within a vehicle such as a van or RV. The sofa-bed includes a seat portion, a back portion, and either a permanently fixed base or a removable leg portion which allows the legs to be installed into the vehicle prior to installing the seat and back portions to allow for additional elements to be installed beneath the sofa-bed, such as power elements for a powered sofa-bed assembly or for other equipment. The sofa-bed can be transformed from a sofa configuration with an upright back portion to a bed configuration with a laid-flat back portion. When in the bed configuration, the seat portion and back portion are aligned such that there is no gap between the two portions and the two portions lie completely flat, forming a complete bed assembly.