Yes, sides and back panels in one piece. Fabric was 62 in. wide, the right mesurement for my plans. But separate panels structure is no problem.
The inner mesh door has a L-shaped 2 ways zip, and is secured by 2 short pieces of soft webbing (knot),for the vestibule doors a one way zip that stops about half way down, several strips of velcro for the bottom part, and a velcro loop to keep it rolled open. The vestibule can be completely opened.