Feel the difference with our Home Decorators Collection 600 Thread Count Supima Cotton Sateen Sheets. Grown in California, American Supima cotton is known for its quality and elegance due to its extra long staple cotton fiber length. Long staple cotton increases the softness and silkiness of the sheet, while reducing pilling, and giving incredible luster to the woven sateen fabric. These 600 thread count supima cotton sheets are backed by the Supima cotton certification board for trusted authenticity. This sheet set also includes the GripOn patented fitted sheet techonology, which is a fully elasticized band that hugs your mattress to prevent shifting. These 600 thread count supima cotton sheets are machine washable for easy cleaning, and be sure to read our wash care tips to ensure you get the best out of these sheets time and time again. You can be confident in your purchase as this 600 thread count sheet set is certified STANDARD 100 by OEKO-TEX, meaning it has been independently tested for harmful substances according to strict scientific criteria that go beyond global legal regulations. Color: Steel Blue.