Police are testing a new type of helmet in three areas of England and Wales.
The helmet is designed for both men and women to wear
Officers in Greater Manchester, Wiltshire and Dyfed-Powys will trial the new lightweight, plastic helmets, two inches shorter than the original.
The old helmets are made of cork but are prone to falling off when officers are running.
The new model is based on a riding hat and with a lower centre of gravity it sits lower on the brow to give more rotection to the forehead.
A total of 100 officers from Thames Valley and Dorset police forces will trial the new helmet for a year from May.
Barry Taylor, the Association of Chief Police Officers spokesman, said: "Each force will be given 30 helmets to use by men and women in a variety
of situations to ascertain its protection, durability and comfort."
"The new helmet has evolved as part of the development of the national
specification for a police uniform.
"This latest helmet, whilst remaining traditional in its appearance and
symbolic to the British police service, will offer better protection,
wearability and comfort for officers."