These caps are made from a woven fabric listed as 100% cotton.
They use a tuck-and-slide (back tuck) closure and include an adjustable strap for a customizable fit.
Sizing is listed as adult/general and commonly described as 'one size fits most,' with an adjustable strap to personalize the fit.
At least one listing is labeled for women; otherwise sizing is described as adult/general (often 'one size fits most') with adjustable straps.
The listings note a 3-inch brim combined with a 5-inch crown height; those dimensions are cited as providing shade that helps shield the eyes from the sun.