These classic bikini panties are made with a breathable cotton material that is comfortable for everyday wear. They provide moderate back coverage for any range of activity. They feature a checker print elastic waistband for a better fit. General sizing guide corresponding to US dress size is: Small (0-2), Medium (4-6), Large (8-10), X-Large (12-14). Made from 92% Cotton 8% Spandex. Machine wash, tumble dry low.