Experience ultimate sleep performance with our Performance TENCEL™ Duvet Cover. It blends Outlast® viscose fibers and TENCEL™ lyocell for unparalleled comfort. Patented Outlast® fibers and TENCEL™ lyocell blend gets softer with each wash with dual temperature regulation capabilities. 4 corner ties to hold your duvet insert or comforter in place Detailed satin piping seams Zippered closure OEKO-TEX® STANDARD 100 Certified Technology. Certification Number: SH025 151577 TESTEX Performance TENCEL™ Duvet Cover blends Outlast® viscose and moisture-wicking TENCEL™ lyocell for balanced temperature throughout the night. The Performance TENCEL™ Duvet Cover has a single-ply construction and long staple fibers for high-quality, breathable comfort while you sleep