What is the best quilt batting for hand quilting and why?

The best quilt batting for hand quilting is generally considered to be a high-quality cotton batting. This is because cotton batting is durable, breathable, and easy to quilt by hand. Additionally, cotton batting provides a nice drape and a slight amount of loft, which can add depth and dimension to the quilted design. Other types of batting, such as polyester or bamboo, may also work well for hand quilting, but cotton is generally considered to be the best choice due to its natural properties and the fact that it will not melt when ironed.