ONE SIZE FITS MOST: Casual style sun hat, snug and cosy fit. ADJUSTABLE & BREATHABLE: Double fabric design, sweat absorption mesh lining, adjustable Chin Strap with an anti-drop button. The chin strap kept the summer hat on your head even in windy weather. FOLDABLE&PORTABLE: The top of the mens sun hat is completely soft and collapsible, pack the waterproof sun hats in your suitcase flat and then when hiking, the womens floppy beach hat folded in half nicely and tucked into your backpack without adding almost any extra weight. The mens beach hat weight just 0.24lb!!! COOL&COMFORTABLE: The mesh part of the cooling hat will definitely keep you cool, even on the hottest and most humid days. WIDELY USED: Perfect for beach, pool, park, camping, hiking, tourism, gardening or any outdoor sports and activities.High-crowned with wide, floppy rims, practical for protection from sun's glare.