頭あたま紐ひも

noun

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.

• ヘルメットの頭あたま紐ひもをしっかり締しめてください。

  Please fasten the helmet's head strap securely.

• この帽ぼう子しには調ちょう整せい可か能のうな頭あたま紐ひもが付ついている。

  This hat comes with an adjustable head strap.