Our Carry On pull-over sling carrier is the only carrier that completely frees both arms while baby remains safe and secure. Just slip on and "Carry On" your busy life with baby. The carrier features a continuous one-piece design with no rings or buckles, so it's safer for baby. It has an adjustable upper and lower drawstring to ensure a perfect fit every time. Available in navy fleece with green tartan plaid trim for cooler climates or black polyester/cotton blend fabric with snappy leopard trim for warmer weather. Size is determined according to the adult wearing it. Order SM-MED if you are under 5'6" /150 lbs or LG-XLG if you are 5'7" /150 lbs or more. Patented.