100% Microfiber WHAT’S INCLUDED - Twin XL Set Includes: 1 Fitted Sheet 39" x 80", 1 Flat Sheet 66" x 102", 1 Pillowcase 20" x 30". WHY WE LOVE THESE SHEETS: 100% microfiber polyester, double brushed to finish for amazing softness. The wrinkle-resistant and incredibly durable design will pamper you all night and leave you feeling rested. EASY FIT - The fitted sheet is fully elasticized with extra strength elastic and can easily accommodate mattresses between 10" - 14” thickness for a snug fit. EASY CARE - Wrinkle and fade resistant, these sheets are machine washable - cold with like-colors - and quick drying for easy care. OEKO-TEX CERTIFIED - Tested and certified to be free from harmful chemicals, these sheets meet high safety standards.