The Quilted Arming Cap is worn under a helmet and/or a mail coif. This arming cap offers extra cushioning for the head. Although the original cloth caps were widely stuffed with rags and straw, our poly/cotton cap is thickly lined with fiber fill. The Quilted Arming Cap is machine washable and is made of quilted construction with a tie cord. The arming cap is available in Small (for 21" head circumference), Medium (22"), Large (23") and X-Large (24").