ADULT SIZE SMALL/MEDIUM: Keep your cool in hot weather with this lightweight & extremely comfortable cap. It’s made with a single seam at the back & a top seam which has a very thin, breathable layer sewn over the edges to protect your scalp from irritation. The bottom edge features a band with a carrier set slightly off center. Fabric is 95% Polyester & 5% Spandex super-fine knit with the feel of pure cotton. Machine wash cool; machine dry on cool setting. Because the pattern is so large, each cap will be slightly different. Small/Medium fits head 21 to 23 circumference. Hibiscus Comfort Cap