crash helmet 
noun
A helmet worn by a motorcyclist to protect the head in case of a crash.Neither were wearing protective clothing or crash helmets....
- Its 200 highly trained members dress in white overalls, padded clothing and crash helmets to protect themselves against police batons and shields.
- Some advise wearing a motorcycle crash helmet with full-face visor, others say ski goggles work fine.
- jobbing master
- jobbism
- jobble
- job book
- job buyer
- job case
- jobcentre
- job club
- job control language
- Job Corps
- job counseling
- job counselling
- job creation
- job creation scheme
- job description
- job discrimination
- job displacement
- job enlargement
- job enrichment
- job evaluation
- job fair
- job font
- job fount
- job holder
- job-hop