The safe, easy, and effective way to ensure your new baby is ergonomically positioned in a natural M-shaped seating position from the start. New easy-to-use design allows you to attach the insert into the carrier before loading baby! Easier for parents with one less step - secure the insert into the carrier before loading baby Better infant positioning, less room for error; Parents feel more secure loading baby; Keep insert conveniently attached to carrier after use; Cooler for baby due to new fan-shape design: Smarter design that provides all the extra support baby needs while allowing more airflow; More snug fit for newborn head and neck support; For your little one: For use with Ergobaby 3 Position Original / Performance carriers and 4 Position 360 carriers. Not for use with Ergobaby Adapt.; For use with babies from 7-12 lbs (3.2-5. Kg); Adjustable neck cushion for extra head and neck support; Padded back panel to support baby?s natural curved spine; Optional removable pillow to adjust for optimal height and ergonomic seated position; 100% Cotton; Machine washable;.