First seen in the early 12th Century, this helmet was simply a form form fitting "skull cap", designed to provide some protection to the wearer. Most often having leather or cloth strapping on either side (to allow fastening under the chin). The Cervelliere was used by Crusading Forces in The Middle East (due to their ease of wear and somewhat comfort). They were cheap and easy to produce. Leather versions were made (and were favored by more common soldiers). It was no doubt "borrowed" from similar Muslim protective covers (in used in The Middle East as well). Often Chain Male could be attached for additional protection (when available).