Thank you for viewing and liking this product. This is the nylon version of FLATS, one of MightyShine's classic caps, featuring a flat visor and a simple design. A screw-type, removable rivet is attached to the back panel, designed to easily hook a mask. A switching pocket is also installed on the left rear panel. Please use it to insert masks or for small items. The main body uses a crisp, water-repellent nylon material. It has a water-repellent finish, so it's fine even if it gets a little wet in the rain. I am selling this as I am organizing my closet.