Inspect the comforter for these things before purchasing:
- Make sure the comforter is well-quilted. Quilting stitches should run both vertically and horizontally with quilting lines about 8–10 inches apart.
- Check the strength of the stitching. Comforters with loose stitching can allow the down to shift.
- Check for fullness in the quilted areas. Thicker filling will provide more insulation.