Rayon fiber from bamboo is obtained from bamboo tree. It absorbs humidity 4 times faster than cotton, and evaporates it quickly. Rayon fabric that is derived from the bamboo plant. The rayon fibers of the bamboo plant are hollow, and the small gaps and holes in bamboo fibers absorb moisture. The rayon fiber from bamboo is known for its excellent breathability. Filling : 50% rayon 50% microgel Fabric : 35% rayon 65% cotton King; 20" x 36", Queen; 20" x 30" Made in Turkey Imported Product Specifications King; 20" x 36", Queen; 20" x 30" Material & Care Cotton Machine washable