50% Polyester, 30% Nylon, 20% spandex; Stretch knit fabric with interior silicone strips provides a comfortable fit and helps to keep this hairband in place; The eye-catching galaxy graphic and reflective NATHAN logo are the ideal combination to help be seen in low-light conditions; Great Stretch: features high-quality stretch knit fabric that is designed to expand to fit most head sizes; Unisex Hairband One size fits most: front 2in - back 1.4in (5cm - 2.3cm) wide and 18.6in (47cm) circumference stretches to 19.6in (49cm); Hand wash cold, Line Dry, Do Not Bleach