Так есть же уже шляпы с пластиковым щитком:https://www.amazon.co.uk/Comhats-Gardening-Adjustable-Removable-Protective/dp/B087BWZ4SS/ref=sr_1_3_sspa?dchild=1&keywords=hat+with+shield&qid=1589357630&sr=8-3-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyQ0pKNlRBQlBGUFJHJmVuY3J5cHRlZElkPUEwOTM1NDc3R1JPV0dXNFI3UlgxJmVuY3J5cHRlZEFkSWQ9QTA0ODg0NzcyQk9aUlFFT0ZEMVg0JndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==