The ERGO Baby Carrier's ergonomic design supports a correct sitting position for the baby's hip, pelvis and spine growth. Made of 14 ounce cotton canvas with 400 threads per inch cotton poplin lining and hood. 100% cotton batting in body of carrier to soften edges. Includes one inch, high density foam in shoulder straps and quarter inch, high density neoprene foam in waist belt. Sleeping hood adjusts in length to growth of baby. National Molding buckles tested up to 235 pounds.