Extra deep fitted sheets Egyptian cotton fibre are considered to be the best because of their length, strength, and softness. A longer fibre means a stronger, more durable fabric and the ability to create a high thread count Fitted Bed Sheet. When working with a high-quality fabric such as Egyptian cotton, the general rule is that the higher the thread count, the better the bedding. Because of the 1500 thread count, the weave of the Fitted Bed Sheet fabric is strong and will last for a long time. This Fitted Bed Sheet are noticeably soft to the touch.