Small flat, the bag itself is heavy. Once full, it weighs the weight of a dead donkey !! The format is not practical for everyday life. The strap has a control system that is not practical because the surplus hangs a sort of loop that will hinder you on the go. It is rather a travel bag that will live on the stroller and not on your shoulders. However, because we appreciate the aesthetics is at the rendezvous. Finally a model for mom and dad. actually a very large bag with pockets, kit, several compartment and a baby changing mat. Fasteners for practice stroller but be careful not to end up attached to a door handle ... the isothermal s pocket is torn after some use for small and impractical.