Ergobaby Easy Snug Infant Insert, in like-new, excellent condition, and from a smoke-free, pet-free home. From website: Our cozy infant insert is designed for an ergonomic and comfortable fir, for a cozy transition from the womb to the world. Provides head and neck support for newborns and younger infants Keeps baby in ergonomic "M" shape position Easily attaches with simple snaps Compatible with the Ergobaby 360, Original, & Performance