Basinet

Open-Face Helmet
This class of open-face helmet, made of reinforced leather or metal, covers most of the head, save the face and neck. These helmets commonly provide protection for the nose (this piece of the helm is called a nasal). Open-face helmets are popular with officers and leaders, and are appropriately worn with medium-weight armors like brigandine and chain mail.
Vision and Hearing: -1 penalty to Vision checks; -2 penalty to Hearing checks (such helms cover the ears entirely except for a small hole).
Closed-Face Helmet
The closed-face helmets are identical to the open-face helmets, but include a visored faceplate. These tend to be worn by officers and sergeants-at-arms. They are most commonly worn with plate mail.
Vision and Hearing: When the visor is up, Vision and Hearing check penalties are identical for those of open-face helmets. Otherwise, the visored wearer suffers a -2 penalty to all Vision checks and a -3 penalty to Hearing checks.