The helmets available are designed with different levels of comfort, stability, use and weight depending on its construction.
Soft Shell - Soft Shells are durable helmets that are flexible and handle low volume and minor day-to-day impacts extremely well. The Soft Shell material bounces back after impacts.
Hard Shell - Hard Shells are a thick ABS plastic glued to a hard foam interior shell.
In-Mold - In-Mold shell construction is a thin hard plastic outer shell with an EPS foam inner.
Hybrid - Hybrid helmets combine the lightweight in-mold construction with a hard shell. Generally, the in-mold shell will go around the sides of the helmet with the hard shell on top. This allows weight reduction while maintaining durability.