Meaning: A helmet is essential for protecting your valuable head from injury while riding a bicycle.
Choice of Words: Essential means absolutely necessary or extremely important. Precious means of great value or importance.
Alternative Expressions
Head protection: helmet required.
Meaning: You must wear a helmet to protect your head.
Choice of Words:Head protection means something that protects your head. Helmet is a hard hat worn to protect your head. Required means it is necessary or mandatory.
Wear a helmet to shield your noggin.
Meaning: Put on a helmet to protect your head.
Choice of Words:Wear means to have something on your body. Helmet is a hard hat worn to protect your head. Shield means to protect something. Noggin is a slang word for head.