Sunday Afternoons Kids' Play Hat (Child, Seagrass) Supplex fabric. Down-sloped flexible brim shades entire face. Full veil covers back of neck. 50 UPF sun protection factor Chin strap ensures that the hat stays on your child! Incredibly portable and great for travel. These hats pack flat, or can be rolled to fit in a purse or pocket. Light weight, plentiful ventilation and a loose fit ensures comfort. Elastic adjuster in back allows the hat to comfortably fit a large range of head sizes.