In-mould construction uses a tough polycarbonate outer shell with the helmet’s impact-absorbing EPS (Expanded Polystyrene) foam liner for good durability without excess weight. This combination of shell and liner results in a better ventilation system.

Hard Shell helmets use a durable ABS shell and a lightweight EPS liner bonded together. This type of helmet tends to have fewer vents and mod-cons but they’re great value and hard-wearing.

Hybrid construction combines in-mould and hard-shell builds for a great balance of durability and weight.

MIPS (Multi-directional Impact Protection System) is not a construction as such, but rather a safety feature integrated into the build. MIPS reduces rotational forces on the brain caused by angled impacts to the head. In a MIPS helmet, the shell and the liner are separated by a low friction layer that allows the helmet to slide relative to the head absorbing much of the energy from impacts. 

Vents allow cool air to get to your head as it warms up from a day’s riding, more vents mean an increased airflow. There are two types of venting systems- passive and active. Passive vents are not adjustable whilst active vents can be opened or closed allowing for airflow regulation throughout the day.