TX-21 is a brand new model that is recognizable by the outer shell. Stylish top vent design for better air flow through the helmet and enhance interior cooling. New chrome chin vent. Removable/washable comfort liner. THH TX21 Off Road Helmet Yellow/Black/Silver XS thh_hlmt_or_tx21_ylbksl.gif Photo`s are for reference only. Please read item title carefully.