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.The pile segments block sweat from migrating from the inner to the outer fabric layers by virtue of their hydrophobic composition. This sweat-blocking function minimizes the occurrence of sweat stains on the body of the headwear and concentrates sweat within the skin-contact fabric layer, from which it is subsequently subject to evaporation and concomitant cooling by air flowing through the pile-supported airspace.