Sweave Bedding's Egyptian Cotton Sheets & Pillowcases are made from 100% Egyptian cotton with a luxurious 400-thread count. They have a breathable percale weave, are OEKO-TEX Standard 100 certified (meaning they're free from harmful substances), and offer a cool and crisp feel that will make you want to stay in bed a little longer. Plus, the fitted sheets are designed with double elastic for a secure and snug fit, ensuring your bedding stays in place throughout the night.