cottonworks exclusive 1000 thread count single ply 100% pima cotton 4 piece sheet set - king size, white cottonworks affordable luxury: single ply 100% extra long staple super fine pima cotton yarns are combed compact and woven into sateen fabric. 1000 thread count sheets are perfect for people looking for heavier weighted sheets. the fabric is super soft, and dense. do not buy these if you are looking for light weight sheets. these are great in any season and make you feel safe and secure when wrapped in this product. pima cotton is extra long staple, highly durable and makes the finest yarns. extremely fine, worthy of 5 stars, and luxury hotels and spas. money back guarantee, machine wash able and dryable.