Our little guy has outgrown this so we're passing it on. It's the exterior frame kind, very supportive and great for fall hikes. I believe this model is rated for kids between 16lb and 40lb, however it's more appropriate for older toddlers IMHO. We are the third owners but it's still in good shape aside from some cosmetic damage. Comes with rain hood. Asking $50 OBO. Photos attached. Thanks! Catherine Sent from my iPhone