1. Nylon will ensure efficient moisture-wicking. It is lightweight, washable and quick-drying, and water/stain resistant. 2. Our lightweight hat has mesh panels that span the entire circumference of your head, letting your head stay ventilated and cool, even on the hottest and most humid days. 3. it is very easy and convenient to fold in 1/2 or 1/4 and remains to keep in good shape, convenient to carry and absolutely save lots of space, portable to fit in small travel bags or handbags.