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Amazon.com : Troy Lee Designs D4 Carbon Full Face Mountain Bike Helmet for Max Ventilation Lightweight MIPS EPP EPS Racing Downhill DH BMX MTB - Adult Men Women - Lines Black/Gray, X-Small :
Troy Lee Designs releases the D4 full-face helmet in TeXtreme Carbon and composite - Bikerumor
Troy Lee Designs D4 Carbon MIPS Helmet - Bike
D4 Carbon Helmet w/MIPS, Stealth Black / Silver | Troy Lee Designs®