head harness; head strap
A strap or harness worn around the head, often used to secure headgear or equipment. The term is somewhat specialized and not an everyday word.
Please fasten the helmet's head strap securely.
This hat comes with an adjustable head strap.
Standard kanji spelling.
Mixed kanji-kana spelling; may be easier for learners.
Compound of 頭 (あたま, 'head') and 紐 (ひも, 'string, cord'). The reading あたまひも is a straightforward combination of the two components.