Polyester SWIFT HOME DIFFERENCE: We live in an era full of small items we want to keep nearby while in bed. This is why we created Smart Sheets - constructed with two 8” deep storage compartments on both sides of the fitted sheet, it is perfect for keeping small items within reach at all times. The sheets are ultra-soft to the touch and the fitted sheet features deep pocket that is fully elasticized to ensure a snug fit on different types of mattresses. PRODUCT CONTENT: 100% microfiber polyester, double brushed to finish for amazing softness – Microfiber is an ultra-fine fiber that can be made from polyester, nylon, or combinations of the two resulting in fabrics that are thin, but durable and wrinkle, fade and shrink resistant. WHAT’S INCLUDED:Twin XL Set – one fitted sheet (39” x 80” x 14”), one flat sheet (66” x 102”) and one pillowcase (20” x 30”) EASY CARE: Machine wash on gentle cycle with cold water and like colors. Then tumble dry on low or air dry for best results. OEKO-TEX STANDARD 100 Certified – and industry standard showing the product has been tested to be free of harmful substances & chemicals.