Agred leather chinstrap. Steel buckles painted in gray color. Leather thickness 1.8 - 2 mm. Look at the last photo. Leather headband: natural high-quality vegetable tanned leather, thickness 4 mm.
This product would be a great fit for military history enthusiasts and World War I re-enactors looking for an authentic helmet liner in a larger size, made from aged leather and displayed in a classic brown color reminiscent of the WWI era.