United States Coast Guard large patch on a navy blue cotton bandana cap is also known as a doo rag, durag, biker do-rag, chemo headscarf, cyclists bandana, helmet liner and biker head-wrap. Adjustable, one size fits many adults and some youth. Lightweight enough to fit under caps, hats and helmets to absorb sweat and moisture. Can be utilizes as a sleeping cap to prevent hair breakage and encourage growth. Other uses include: restaurants for chefs, cooks, hunting, fishing, boating, football, baseball, basketball, softball, volleyball, tennis, cycling, biking, workouts, gym, yoga, landscaping, gardening, yard work, shooting, range, walking, running, jogging, boxing, sporting events, concerts, skiing, swimming, hiking, rock climbing, paintball, traveling, atvs, convertibles and motorcycle riding.