DreamFit Bamboo Rayon Blend Sheet Set King - Ecru 70% Viscose from Bamboo, 30% Cotton Made in USA and Imported Ultra Soft Comfort & Breathability;Naturally Hypo-Allergenic;Moisture Wicking & Bacteria Resistant Patented DreamFit Guaranteed to Fit Guaranteed to Stay On construction fits any sized mattress. High Performance Elastic sewn around entire sheet- 4X wider and 20X stronger than standard elastic. Patented strap design guarantees your DreamFit fitted sheet will stay put even with the addition of feather beds, mattress toppers, or foam. 1-Year Warranty Covers Workmanship & Material Defects.