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.
- south-southeasterly
- south-south-eastwards
- south-southerly
- south-south-west
- south-southwesterly
- south-south-westwards
- South Sudan
- South Sudanese
- South Suffolk
- south temperate
- South Triangle
- Southumbrian
- southward
- southwardly
- southwards
- south-west
- South West Africa
- South West Africa People's Organization
- southwester
- south-westerly
- south-western
- southwesterner
- south-westernmost
- south-westward
- southwestwardly