Breathable Mesh The breathable mesh panel helps your head cool and stays ventilated even on the hottest and most humid days Windproof The hat is equipped with an adjustable chin strap for a windy conditions. Velcro strap High quality Velcro, comfortable fit, easy to put on and take off the mask. Adjustable Buckle The elastic buckle behind the hat is adjustable,one size fits most adults head size,snug and cosy fit. Lightweight Design Lightweight is only 3.6oz,high quality materials,makes you feel very comfortable and cool. › See more product details