Thule Sapling Baby Backpack*There is a $40 flat fee shipping charge on Child Carriers due to size.* A child carrier that gives you the freedom to move A child carrier backpack with a machine washable child seat that provides under leg support to maximize comfort on any adventure. Our unique system for this support is called ErgoRide, and in terms of comfort and ease of use, the ErgoRide child cockpit truly delivers. It provides one of the most comfortable rides on the market