They are Lightweight, and they keep you warm. And investing in a couple of duvets in different colors and patterns not only keeps your down comforter clean, it also helps to give your bedding a different look for the winter months. If you are thinking of investing in a down comforter look for these 2 facts:
The quality of down can be determined by the fill power or loft. Purchase one above a fill power of 600 or more to keep warm and cozy all winter long.
2- Box stitch
Look at the stitching construction. A box stitch construction, one that forms a grid pattern across the surface. This will prevent your comforter from clumping and shifting over time.