Your Thule Sleek comes assembled and ready to use out of the box. When purchasing the main items see below whats included in the box.
Thule Sleek Stroller: stroller chassis, main seat and rain cover.
Thule Sleek Bassinet: bassinet, bassinet rain cover, upper and lower adapters.
Thule Sleek Sibling Seat: sibling seat, sibling seat rain cover, upper and lower adapters.