Crib Size 45 in. x 60 in. Heirloom Premium 80/20 Cotton Blend. Heirloom Premium 80/20 Cotton Blend is one of Hobbs' most popular battings, offering more loft and less weight than traditional cotton batting. Heirloom Premium is wonderful to quilt by hand or machine. This blend is made with 80% natural cotton and 20% fine polyester. It is needle punched and has a light resin bonding to provide exceptional strength and durability. Close quilting yields a flat low loft appearance while more space between stitching lines yields a slightly higher loft. Heirloom Premium should be used with medium or dark fabrics. If used with light colored fabrics, unbleached cotton can slightly darken white and pastel colors. You may experience shrinkage of 3-5% and it may be quilted up to 4 in. apart. Hobbs suggests that quilt makers spend some time learning about this product before using it on a major project — making samples using this batting to see how it needles and launders is recommended.