All Head Trip helmets have a carbon/Kevlar® shell and an energy absorbing Ensolite liner. This combination offers a higher level of protection and impact resistance than common mini-cell foam liners. Die-cut Ensolite sizing pads are included with each helmet for a custom fit. This is a great creek boating helmet. The carbon/kevlar construction is a light weight material with considerable impact resistance. The design of this helmet provides side and rear protection for all those nasty rolls & spills.