A natural fiber made from the pulp of the bamboo grass. Our bamboo garments are made from luxuriously soft fabric that is naturally hypoallergenic, moisture wicking and quick drying.  Bamboo fabric is: warmer on cool days cooler in the heat breathable silky soft lightweight antibacterial Fabric Composition 95% Rayon from Bamboo / 5% Spandex Care Instructions Machine wash delicate, gentle setting. Do not bleach. Tumble dry at low delicate cycle. Do not iron.