Neck brace compatible design: simply slide underneath the plastics or remove the plastic panels on the chest and back depending upon neck brace design

Recycled fabric

This ensures the highest strength and quality for maximum control and peace of mind

modernized-fit of the Arkon gear line

Visors with nine pin retention system for maximum stability

Troy Lee Designs D4 Composite Pinned MIPS Adult MTB Helmets Size:Medium Neck brace compatible design: simplyTroy Lee Designs D4 Composite Pinned MIPS Adult MTB Helmets Always Evolving. Built with an aerospace shell design and materials, we were able to get the D4 Composite helmet to 1050 grams without sacrificing any strength. Mips C2 protection system is used to add an additional layer of safety in the event of a fall. For comfort, the D4 Composite routes cooling air through a front air intake system that flows through the polymer center and power grid