there are a number of high=loft batts to choose from- read the packaging and choose the one that (fits) your quilting plan (as in some need to be quilted every 2-4"-others do not need so much quilting)
if you do not follow the recommended quilting distance-if you use a batt that needs to be quilted every 2" and you quilt every 6" the batting will over time separate- bunch up and cause hard balls of batting in the areas between quilting lines-
you can however buy a batt that can be quilted every 10" and quilt it as closely as you want-
for high loft you do not want to densly quilt= it will flatten it.