Mebby Jelly Belly Changing Mat, Cream by Mebby. $49.99. The Jelly Baby Changing Mat by Mebby is an ergonomic mat designed to mold to your baby's body providing optimal support in any position. The unique shape cradles baby to prevent rolling. The soft, memory foam is non-allergenic, bacteria-resistant and wipes clean. This PVC and latex free changing mat is naturally warm to the touch and will provide maximum support to keep baby comfortable during changes.