Cap Composition: 95% Bamboo & 5% Elastane Bamboo fabric is the most versatile fabric especially for cancer patients as it is soft, natural and breathable fabric that wicks moisture. The stretch knit band ensure that the cap stays in place for long while the bamboo fabric provides comfort. It completely covers that head and is a great option for head cover during hear loss. Hair loss is one of the most distressing side effects of most cancer treatments.