Thread count is defined as the number of vertical and horizontal threads per square inch in a woven fabric. A bedsheet with a higher thread count is more durable than the one with a lower thread count. However, the one with the highest isn\'t always the best but does mean more money. To increase the thread count, sometimes more weaving is done to the horizontal portion of the sheet, which doesn\'t make it any better but distorts the original shape. That\'s why it is not considered the best way of choosing a bedsheet. The best range of thread count for cotton bedsheets is around 500, common in premium quality bed sheets.