US Patent 7497097 Sweat blocking and ventilating sweatband for headwear

A spacer-fabric sweatband, for, and incorporated into headwear which has an inner, skin-contact fabric layer, and an outer, headwear-facing fabric layer connected by a multiplicity of hydrophobic monofilament-pile spacing elements. The pile spacing elements function like thousands of miniature springs to maintain the fabric layers in uniform spaced parallel relation while creating substantial, pile-supported airspace between the fabric layers to facilitate the movement of ventilating airflow. The headwear-facing fabric layer is mesh-like for enhanced air circulation. The skin-contact layer is composed of solid skin-friendly fabric.