Havelock

[hævlɒk]

(noun.) a cloth covering for a service cap with a flap extending over the back of the neck to protect the neck from direct rays of the sun.

Checker: Pamela--From WordNet

(n.) A light cloth covering for the head and neck, used by soldiers as a protection from sunstroke.

Typist: Nora

n. a white cover for a military cap with a long rear flap as a protection from the sun.

Typist: Ora

Editor: Sheldon