Bell Tracker - All-purpose artist. In terms of style and versatility, the Tracker plays big - ready for fitness tours, commuting, or relaxed cruising through the neighborhood. Rugged and great-looking in-mold shell? Check. Extended head coverage? Check. Removable visor? Check. This proven performer is well-equipped and now offers a sleek, easy-to-use one-handed adjustment option with the new Ergo Fit fitting system. Mark of approval: CPSC. Closure system: No twist tri-glides. Visor/shield: Shield. Purpose: MTB. Weight: 273 g. Helmet construction: In-mold technology. Adjustment system: Float fit material. Material: Polycarbonate shell. Ventilation openings: 25.