No more slumping!! We’ve all tried to accomplish this same effect with diapers and blankets. Well, leave it to the professionals to design a positioner that actually works. This is made of memory foam and is designed to support the entire baby, from bottom to shoulder blades (which actually helps open the chest and allows for better breathing). You can make adjustments for a perfect fit. This product has been safety rated for infant car seats. At Amazon for $34.95.