Understanding Bedding Terms


A construction feature where thin fabric "walls" connect the top and bottom layers of the shell. This allows the fill to touch along the sew lines in stitched boxes or channels to assist in keeping its loft, prevent shifting or bunching and give a fuller appearance.


Horizontal or vertical "columns" that are sewn through the top and bottom layers of the comforter shell to help prevent shifting and bunching.


The soft, fluffy under plumage of geese and ducks. Used as fill for its natural insulating properties.

Duvet Cover

A large “pillowcase” like cover typically used to cover down comforters.

Euro Pillow

In most pictures of bedding, these are the pillows you see immediately against the head board. A large square pillow that usually measures 26" by 26". Often used as decorative accents to complete a bedding collection, or to provide extra support when reading or watching TV in bed. Euro pillows may also be placed on a daybed or the floor as a functional alternative to an accent pillow.

Fill Power

The amount of space in cubic inches that 1 ounce of down will occupy at maximum loft. The higher the fill power, the warmer and fluffier the comforter. NOTE: fill power is not a measure of weight. For example, a comforter with a high fill power and lower fill weight will provide exceptional warmth without feeling heavy.

Fill Weight

The actual weight of down, as measured in ounces. The higher the fill weight number, the heavier the comforter is. NOTE: fill weight is not a measure of warmth. For example, a comforter with a high Fill Weight and low fill power will provide a reassuringly heavy feeling without being too warm.


Fabric "walls" on the perimeter of pillows, comforters, featherbeds and mattress pads that improve stability, reinforce seams and provide additional support, especially in pillows.


Fill materials that are very unlikely to cause an allergic reaction and may help reduce presence of dust mites. Hypoallergenic fill can be either specially treated natural material like feathers and down or synthetic material like polyester.


A measurement indicating the thickness and fluffiness of the fill in comforters, pillows and featherbeds.

Mattress Pad

A thin pad most often made of cotton and polyester that fits over the top of your mattress. Aids in protecting your mattress, keeping the sheets in place and providing additional softness, comfort and support.

Mattress Protector

A plain, durable, removable case that fully encases and protects a mattress from skin oils and dust mites to extend its life. Used underneath fitted sheets and mattress pad.

Mattress Topper

A pad constructed from foam, fiber, or feathers that is placed on top of your mattress and adjusts to the contours of your body for optimum support. King size toppers are also used to seamlessly connect two twin mattresses.

Sewn-Through Box

Sewing the top and bottom layers of the comforter in horizontal and vertical lines, to form boxes that can range 4"-18" in size. An effective method for eliminating down shifting and bunching in the comforter.

Standard Size

Refers to both a pillow and a pillowcase that measures 20" x 26". Sometimes called "jumbo" size. For reference, a twin bed accommodates one standard pillow, full and queen accommodate two, and a king bed fits three.

Thread Count

The number of vertical and horizontal threads woven into a square inch of fabric. A higher thread count cover will have a finer weave and softer feel, while decreasing the amount of feathers poking through and the amount of dirt getting in.

Twin X-Long

A size of mattress that is longer than a standard twin, measuring 39" x 80". Twin X-Long mattresses are usually used in dormitory rooms.