Belledorm Pima Cotton Sateen 450 Thread Count Flat Sheet in Light Grey Size: King; Pima cotton is considered to be one of the most superior cottons in the world due to its extra-long staple fibres. Longer, silkier individual fibres create a fabric that is not only durable and strong but also super smooth to the touch. Belledorm Pima Cotton Sateen 450 Thread Count Flat Sheet in Light Grey Size: King color: Light Grey