Headcovers Unlimited Slouchy Soft Hat - Cancer Beanie Cap: Serendipity Chemo Cap for Women Made from a soft blend of 64% cotton and 36% rayon. A slight stretch allows for this hat to fit multiple head sizes. Provides total head coverage, ideal for women with hair loss due to cancer, chemotherapy, alopecia, or other hair loss conditions. A versatile look that can be worn with almost anything. Fullness in the back gives the look of hair underneath.