A sun hat shades the face, ears and neck, which a shirt cannot reach. For the beach or a day out, choose a wide brim (around 7 cm or more) with a chin strap so it stays on in the wind. Visors and caps are cooler for running and sport but leave the ears and neck exposed. A packable hat is handy for travel. Check the head size on the listing, whether there is a size adjuster, and whether the inner band absorbs sweat. The list is ranked by the independent usdxu score from real sales and ratings.