Infantino has included an easy buckling system exclusive to the Front 2 back Rider as well as adjustable lumber supports to help prevent back strain. Other features of the Infantino Front 2 Back Rider has dual side openings allowing mum or dad to get baby in and out easy, this feature is essential. Other features include tidy hook and loop wraps to contain excess straps, wide memory foam straps and handy pockets for keys, wallets and more. The bib folds & snaps down for baby facing forward. Suitable to use with babies sized 3.6kg - 14.5kg.