
duvet insert with ties

Thread count refers to the number of threads (both horizontal and vertical) in one square inch of material. Generally speaking, the greater the number, the smoother, more durable the sheet. At one point thread count played a large part in what type of sheets sleepers bought, but it’s becoming more important to focus on the overall quality instead.
However, the one aspect of fit you may want to consider is pocket depth. Fitted sheets can vary in how deep the pockets are, since mattress heights are not standardized like length and width. If your mattress is more than 10 inches tall, you may want to consider looking specifically for deep-pocket fitted sheets. We recommend the pockets be a few inches larger than the height of your bed — if your bed is 15 inches tall, look for 16 to 17 inch pockets.