There are two general construction types for Down Comforters- open and closed.
An Open Construction comforter means the down is not confined to a channel or chamber, allowing it to be distributed throughout the comforter.
*Examples are: Ring Stitch, Karo Tack and Box Step
A Closed construction comforter confines the down in a specific space, minimizing the migration of fill for maximum comfort.
*Examples: End to End, Box and Baffle Box
What is Fill Power: Down is often rated with a fill power rating. Fill power is a measurement in cubic inches that one ounce of down will fill when placed in a glass tube and allowed to loft for up to 72 hours. Generally the higher the fill power increases the warmth of an item. The majority of products sold have a fill power rating of 500-550. Mid and top tier goods generally have rating of 575-650, while fill powers above 700 being extremely rare.
Common Fill Types:
- 95% Feather / 5% Down - Good
- White Duck Down (WDD) - Better
- White Goose Down (WGD) - Best
Ticking: The outer covering, better comforters will have higher thread counts providing soft luxurious covers.