Adjaye's Double Zero chairs and stools each comprise two circular pads that form the seat and back.
The upholstered cushions are held within rings of tubular stainless steel, which is also bent to form a supporting frame of sleigh-type legs and optional arms.
Finished in chrome, the metal is also used to form a square element spanning the gap between the legs of the chair, bracing the structure and providing a footrest.
"The Double Zero collection by David Adjaye was born as a study of shape and an exploration of the primary composition required for supporting the body in space," said a statement from Italian furniture brand Moroso.
The design is also doubled up to form a small two-seater sofa, with the pair of pads placed side by side and joined where the metal hoops touch.
The metal frames will be available in a range of colours, and upholstery options will include plain and patterned fabrics as well as leather.
Adjaye's collection is being shown on the Moroso stand at the Salone del Mobile, which opens today and runs until 19 April.
The London-based architect's other forays into furniture design include the Washington collection for Knoll, which was developed alongside his design for the Smithsonian National Museum of African American History and Culture in the US capital.
He also launched a minimal stool shaped like the number seven for new design platform Standseven in September 2014.
Photography is by Alessandro Paderni.